diff --git a/CoreStoreTests/BaseTests/BaseTestDataTestCase.swift b/CoreStoreTests/BaseTests/BaseTestDataTestCase.swift
index 6963c64..ba86b1d 100644
--- a/CoreStoreTests/BaseTests/BaseTestDataTestCase.swift
+++ b/CoreStoreTests/BaseTests/BaseTestDataTestCase.swift
@@ -30,7 +30,7 @@ class BaseTestDataTestCase: BaseTestCase {
     @nonobjc
     func prepareTestDataForStack(_ stack: DataStack, configurations: [String?] = [nil]) {
         
-        _ = stack.beginSynchronous { (transaction) in
+        stack.beginSynchronous { (transaction) in
             
             for (configurationIndex, configuration) in configurations.enumerated() {
                 
diff --git a/CoreStoreTests/FetchTests.swift b/CoreStoreTests/FetchTests.swift
index 45e6021..7e03514 100644
--- a/CoreStoreTests/FetchTests.swift
+++ b/CoreStoreTests/FetchTests.swift
@@ -73,7 +73,7 @@ final class FetchTests: BaseTestDataTestCase {
                 let fetchExpectation = self.expectation(withDescription: "fetch")
                 
                 var existing1: TestEntity1?
-                _ = _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     existing1 = transaction.fetchExisting(object)
                     XCTAssertNotNil(existing1)
@@ -166,7 +166,7 @@ final class FetchTests: BaseTestDataTestCase {
                 let fetchExpectation = self.expectation(withDescription: "fetch")
                 
                 var existing1 = [TestEntity1]()
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     existing1 = transaction.fetchExisting(objects)
                     XCTAssertEqual(
@@ -1724,7 +1724,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -1768,7 +1768,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -1812,7 +1812,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -1863,7 +1863,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -1907,7 +1907,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -1951,7 +1951,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -1995,7 +1995,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config2")
                 do {
@@ -2046,7 +2046,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config1")
                 do {
@@ -2090,7 +2090,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config2")
                 do {
@@ -2134,7 +2134,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertNil(objectID)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1", "Config2")
                 do {
@@ -2189,7 +2189,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -2259,7 +2259,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -2329,7 +2329,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -2380,7 +2380,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -2444,7 +2444,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -2512,7 +2512,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -2580,7 +2580,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config2")
                 do {
@@ -2629,7 +2629,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config1")
                 do {
@@ -2693,7 +2693,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config2")
                 do {
@@ -2761,7 +2761,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(objectIDs?.count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1", "Config2")
                 do {
@@ -2840,7 +2840,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -2876,7 +2876,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -2912,7 +2912,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -2951,7 +2951,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>()
                 do {
@@ -2987,7 +2987,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil)
                 do {
@@ -3023,7 +3023,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1")
                 do {
@@ -3059,7 +3059,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config2")
                 do {
@@ -3098,7 +3098,7 @@ final class FetchTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack, configurations: configurations)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config1")
                 do {
@@ -3134,7 +3134,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>(nil, "Config2")
                 do {
@@ -3170,7 +3170,7 @@ final class FetchTests: BaseTestDataTestCase {
                     XCTAssertEqual(count, 0)
                 }
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let from = From<TestEntity1>("Config1", "Config2")
                 do {
diff --git a/CoreStoreTests/ImportTests.swift b/CoreStoreTests/ImportTests.swift
index 7372551..1828de0 100644
--- a/CoreStoreTests/ImportTests.swift
+++ b/CoreStoreTests/ImportTests.swift
@@ -38,7 +38,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -70,7 +70,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let errorExpectation = self.expectation(withDescription: "error")
                 do {
@@ -119,7 +119,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -178,7 +178,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -232,7 +232,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let errorExpectation = self.expectation(withDescription: "error")
                 do {
@@ -292,7 +292,7 @@ class ImportTests: BaseTestDataTestCase {
         
         self.prepareStack { (stack) in
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -351,7 +351,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -421,7 +421,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -521,7 +521,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -600,7 +600,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
@@ -658,7 +658,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let errorExpectation = self.expectation(withDescription: "error")
                 do {
@@ -705,7 +705,7 @@ class ImportTests: BaseTestDataTestCase {
                 self.checkExpectationsImmediately()
                 transaction.context.reset()
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let errorExpectation = self.expectation(withDescription: "error")
                 do {
@@ -758,7 +758,7 @@ class ImportTests: BaseTestDataTestCase {
                 self.checkExpectationsImmediately()
                 transaction.context.reset()
             }
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 let errorExpectation = self.expectation(withDescription: "error")
                 do {
@@ -820,7 +820,7 @@ class ImportTests: BaseTestDataTestCase {
             
             self.prepareTestDataForStack(stack)
             
-            _ = stack.beginSynchronous { (transaction) in
+            stack.beginSynchronous { (transaction) in
                 
                 do {
                     
diff --git a/CoreStoreTests/TransactionTests.swift b/CoreStoreTests/TransactionTests.swift
index 058788b..ffc1364 100644
--- a/CoreStoreTests/TransactionTests.swift
+++ b/CoreStoreTests/TransactionTests.swift
@@ -43,7 +43,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let createExpectation = self.expectation(withDescription: "create")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.create(Into<TestEntity1>())
                     object.testEntityID = NSNumber(value: 1)
@@ -75,7 +75,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let updateExpectation = self.expectation(withDescription: "update")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     guard let object = transaction.fetchOne(From<TestEntity1>()) else {
                         
@@ -110,7 +110,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let deleteExpectation = self.expectation(withDescription: "delete")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.fetchOne(From<TestEntity1>())
                     transaction.delete(object)
@@ -144,7 +144,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let createExpectation = self.expectation(withDescription: "create")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.create(Into<TestEntity1>("Config1"))
                     object.testEntityID = NSNumber(value: 1)
@@ -177,7 +177,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let updateExpectation = self.expectation(withDescription: "update")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     guard let object = transaction.fetchOne(From<TestEntity1>("Config1")) else {
                         
@@ -213,7 +213,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let deleteExpectation = self.expectation(withDescription: "delete")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.fetchOne(From<TestEntity1>("Config1"))
                     transaction.delete(object)
@@ -245,7 +245,7 @@ final class TransactionTests: BaseTestCase {
                 
                 let createDiscardExpectation = self.expectation(withDescription: "create-discard")
                 let loggerExpectations = self.prepareLoggerExpectations([.logWarning])
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.create(Into<TestEntity1>())
                     object.testEntityID = NSNumber(value: 1)
@@ -267,7 +267,7 @@ final class TransactionTests: BaseTestCase {
             do {
                 
                 let createExpectation = self.expectation(withDescription: "create")
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     let object = transaction.create(Into<TestEntity1>())
                     object.testEntityID = NSNumber(value: 1)
@@ -290,7 +290,7 @@ final class TransactionTests: BaseTestCase {
                 
                 let updateDiscardExpectation = self.expectation(withDescription: "update-discard")
                 let loggerExpectations = self.prepareLoggerExpectations([.logWarning])
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     guard let object = transaction.fetchOne(From<TestEntity1>()) else {
                         
@@ -319,7 +319,7 @@ final class TransactionTests: BaseTestCase {
                 
                 let deleteDiscardExpectation = self.expectation(withDescription: "delete-discard")
                 let loggerExpectations = self.prepareLoggerExpectations([.logWarning])
-                _ = stack.beginSynchronous { (transaction) in
+                stack.beginSynchronous { (transaction) in
                     
                     guard let object = transaction.fetchOne(From<TestEntity1>()) else {
                         
diff --git a/Sources/Internal/FetchedResultsControllerDelegate.swift b/Sources/Internal/FetchedResultsControllerDelegate.swift
index 7e7fd95..ca6b34b 100644
--- a/Sources/Internal/FetchedResultsControllerDelegate.swift
+++ b/Sources/Internal/FetchedResultsControllerDelegate.swift
@@ -76,7 +76,7 @@ internal final class FetchedResultsControllerDelegate<EntityType: NSManagedObjec
     // MARK: NSFetchedResultsControllerDelegate
     
     @objc
-        dynamic func controllerWillChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
+    dynamic func controllerWillChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
         
         guard self.enabled else {
             
diff --git a/Sources/ObjectiveC/CSAsynchronousDataTransaction.swift b/Sources/ObjectiveC/CSAsynchronousDataTransaction.swift
index c213a86..70b06c3 100644
--- a/Sources/ObjectiveC/CSAsynchronousDataTransaction.swift
+++ b/Sources/ObjectiveC/CSAsynchronousDataTransaction.swift
@@ -58,6 +58,7 @@ public final class CSAsynchronousDataTransaction: CSBaseDataTransaction {
      - returns: a `CSSaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
     @objc
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: CSSynchronousDataTransaction) -> Void) -> CSSaveResult? {
         
         return bridge {
diff --git a/Sources/ObjectiveC/CSCoreStore+Transaction.swift b/Sources/ObjectiveC/CSCoreStore+Transaction.swift
index b6c68f1..c793d54 100644
--- a/Sources/ObjectiveC/CSCoreStore+Transaction.swift
+++ b/Sources/ObjectiveC/CSCoreStore+Transaction.swift
@@ -51,6 +51,7 @@ public extension CSCoreStore {
      - returns: a `CSSaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
     @objc
+    @discardableResult
     public static func beginSynchronous(_ closure: (transaction: CSSynchronousDataTransaction) -> Void) -> CSSaveResult? {
         
         return bridge {
diff --git a/Sources/ObjectiveC/CSDataStack+Transaction.swift b/Sources/ObjectiveC/CSDataStack+Transaction.swift
index ebdfca9..b4416b8 100644
--- a/Sources/ObjectiveC/CSDataStack+Transaction.swift
+++ b/Sources/ObjectiveC/CSDataStack+Transaction.swift
@@ -51,6 +51,7 @@ public extension CSDataStack {
      - returns: a `CSSaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
     @objc
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: CSSynchronousDataTransaction) -> Void) -> CSSaveResult? {
         
         return bridge {
diff --git a/Sources/ObjectiveC/CSSynchronousDataTransaction.swift b/Sources/ObjectiveC/CSSynchronousDataTransaction.swift
index 774849d..767b25c 100644
--- a/Sources/ObjectiveC/CSSynchronousDataTransaction.swift
+++ b/Sources/ObjectiveC/CSSynchronousDataTransaction.swift
@@ -58,6 +58,7 @@ public final class CSSynchronousDataTransaction: CSBaseDataTransaction {
      - returns: a `CSSaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
     @objc
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: CSSynchronousDataTransaction) -> Void) -> CSSaveResult? {
         
         return bridge {
diff --git a/Sources/Observing/ObjectMonitor.swift b/Sources/Observing/ObjectMonitor.swift
index 0b7d9d1..01ba28d 100644
--- a/Sources/Observing/ObjectMonitor.swift
+++ b/Sources/Observing/ObjectMonitor.swift
@@ -367,8 +367,8 @@ extension ObjectMonitor: FetchedResultsControllerHandler {
 private extension Notification.Name {
     
     private static let objectMonitorWillChangeObject = Notification.Name(rawValue: "objectMonitorWillChangeObject")
-    private static let objectMonitorDidDeleteObject = Notification.Name(rawValue: "objectMonitorWillChangeObject")
-    private static let objectMonitorDidUpdateObject = Notification.Name(rawValue: "objectMonitorWillChangeObject")
+    private static let objectMonitorDidDeleteObject = Notification.Name(rawValue: "objectMonitorDidDeleteObject")
+    private static let objectMonitorDidUpdateObject = Notification.Name(rawValue: "objectMonitorDidUpdateObject")
 }
 
 #endif
diff --git a/Sources/Transactions/AsynchronousDataTransaction.swift b/Sources/Transactions/AsynchronousDataTransaction.swift
index a634030..5d8040b 100644
--- a/Sources/Transactions/AsynchronousDataTransaction.swift
+++ b/Sources/Transactions/AsynchronousDataTransaction.swift
@@ -71,6 +71,7 @@ public final class AsynchronousDataTransaction: BaseDataTransaction {
      - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
      - returns: a `SaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: SynchronousDataTransaction) -> Void) -> SaveResult? {
         
         CoreStore.assert(
diff --git a/Sources/Transactions/CoreStore+Transaction.swift b/Sources/Transactions/CoreStore+Transaction.swift
index 1eef738..aaa1277 100644
--- a/Sources/Transactions/CoreStore+Transaction.swift
+++ b/Sources/Transactions/CoreStore+Transaction.swift
@@ -46,6 +46,7 @@ public extension CoreStore {
      - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
      - returns: a `SaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
+    @discardableResult
     public static func beginSynchronous(_ closure: (transaction: SynchronousDataTransaction) -> Void) -> SaveResult? {
         
         return self.defaultStack.beginSynchronous(closure)
diff --git a/Sources/Transactions/DataStack+Transaction.swift b/Sources/Transactions/DataStack+Transaction.swift
index c7c0789..db91ecc 100644
--- a/Sources/Transactions/DataStack+Transaction.swift
+++ b/Sources/Transactions/DataStack+Transaction.swift
@@ -53,6 +53,7 @@ public extension DataStack {
      - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
      - returns: a `SaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: SynchronousDataTransaction) -> Void) -> SaveResult? {
         
         return SynchronousDataTransaction(
diff --git a/Sources/Transactions/SynchronousDataTransaction.swift b/Sources/Transactions/SynchronousDataTransaction.swift
index 192fcda..6d6a272 100644
--- a/Sources/Transactions/SynchronousDataTransaction.swift
+++ b/Sources/Transactions/SynchronousDataTransaction.swift
@@ -66,6 +66,7 @@ public final class SynchronousDataTransaction: BaseDataTransaction {
      - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
      - returns: a `SaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
      */
+    @discardableResult
     public func beginSynchronous(_ closure: (transaction: SynchronousDataTransaction) -> Void) -> SaveResult? {
         
         CoreStore.assert(