tidy up

CoreStore/Fetching and Querying/Concrete Clauses/Select.swift

@@ -406,12 +406,12 @@ extension Int8: SelectValueResultType {
     
     public static func fromResultObject(result: AnyObject) -> Int8? {
         
-        if let value = (result as? NSNumber)?.longLongValue {
+        guard let value = (result as? NSNumber)?.longLongValue else {
             
-            return numericCast(value) as Int8
-        }
             return nil
         }
+        return numericCast(value) as Int8
+    }
 }
 
 
@@ -426,12 +426,12 @@ extension Int16: SelectValueResultType {
     
     public static func fromResultObject(result: AnyObject) -> Int16? {
         
-        if let value = (result as? NSNumber)?.longLongValue {
+        guard let value = (result as? NSNumber)?.longLongValue else {
             
-            return numericCast(value) as Int16
-        }
             return nil
         }
+        return numericCast(value) as Int16
+    }
 }
 
 
@@ -446,12 +446,12 @@ extension Int32: SelectValueResultType {
     
     public static func fromResultObject(result: AnyObject) -> Int32? {
         
-        if let value = (result as? NSNumber)?.longLongValue {
+        guard let value = (result as? NSNumber)?.longLongValue else {
             
-            return numericCast(value) as Int32
-        }
             return nil
         }
+        return numericCast(value) as Int32
+    }
 }
 
 
@@ -482,12 +482,12 @@ extension Int: SelectValueResultType {
     
     public static func fromResultObject(result: AnyObject) -> Int? {
         
-        if let value = (result as? NSNumber)?.longLongValue {
+        guard let value = (result as? NSNumber)?.longLongValue else {
             
-            return numericCast(value) as Int
-        }
             return nil
         }
+        return numericCast(value) as Int
+    }
 }
 
 

CoreStore/Internal/MigrationManager.swift

@@ -37,12 +37,13 @@ internal final class MigrationManager: NSMigrationManager, NSProgressReporting {
         
         super.didChangeValueForKey(key)
         
-        if key == "migrationProgress" {
+        guard key == "migrationProgress" else {
             
+            return
+        }
         let progress = self.progress
         progress.completedUnitCount = Int64(Float(progress.totalUnitCount) * self.migrationProgress)
     }
-    }
     
     
     // MARK: NSMigrationManager

CoreStore/Internal/NSFileManager+Setup.swift

@@ -17,22 +17,10 @@ internal extension NSFileManager {
     
     internal func removeSQLiteStoreAtURL(fileURL: NSURL) {
         
-        do {
+        _ = try? self.removeItemAtURL(fileURL)
         
-            try self.removeItemAtURL(fileURL)
+        let filePath = fileURL.path!
-        }
+        _ = try? self.removeItemAtPath(filePath.stringByAppendingString("-shm"))
-        catch _ { }
+        _ = try? self.removeItemAtPath(filePath.stringByAppendingString("-wal"))
-        
-        do {
-            
-            try self.removeItemAtPath(fileURL.path!.stringByAppendingString("-shm"))
-        }
-        catch _ { }
-        
-        do {
-            
-            try self.removeItemAtPath(fileURL.path!.stringByAppendingString("-wal"))
-        }
-        catch _ { }
     }
 }

CoreStore/Internal/NSManagedObjectContext+CoreStore.swift

@@ -61,15 +61,15 @@ internal extension NSManagedObjectContext {
     
     internal func entityDescriptionForEntityClass(entity: AnyClass) -> NSEntityDescription? {
         
-        if let entityName = self.parentStack?.entityNameForEntityClass(entity) {
+        guard let entityName = self.parentStack?.entityNameForEntityClass(entity) else {
             
+            return nil
+        }
         return NSEntityDescription.entityForName(
             entityName,
             inManagedObjectContext: self
         )
     }
-        return nil
-    }
     
     internal func setupForCoreStoreWithContextName(contextName: String) {
         
@@ -83,7 +83,7 @@ internal extension NSManagedObjectContext {
                 let context = note.object as! NSManagedObjectContext
                 let insertedObjects = context.insertedObjects
                 let numberOfInsertedObjects = insertedObjects.count
-                if numberOfInsertedObjects <= 0 {
+                guard numberOfInsertedObjects > 0 else {
                     
                     return
                 }
@@ -91,7 +91,6 @@ internal extension NSManagedObjectContext {
                 do {
                     
                     try context.obtainPermanentIDsForObjects(Array(insertedObjects))
-                    return
                 }
                 catch {
                     

CoreStore/Internal/NSManagedObjectContext+Querying.swift

@@ -37,24 +37,17 @@ internal extension NSManagedObjectContext {
         
         if object.objectID.temporaryID {
             
-            var objectIDError: NSError?
-            let didSucceed = withExtendedLifetime(self) { (context: NSManagedObjectContext) -> Bool in
-                
             do {
                 
+                try withExtendedLifetime(self) { (context: NSManagedObjectContext) -> Void in
+                    
                     try context.obtainPermanentIDsForObjects([object])
-                    return true
+                }
             }
             catch {
                 
-                    objectIDError = error as NSError
-                    return false
-                }
-            }
-            if didSucceed != true {
-                
                 CoreStore.handleError(
-                    objectIDError ?? NSError(coreStoreErrorCode: .UnknownError),
+                    error as NSError,
                     "Failed to obtain permanent ID for object."
                 )
                 return nil
@@ -76,7 +69,6 @@ internal extension NSManagedObjectContext {
         }
     }
     
-    
     internal func fetchOne<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> T? {
         
         return self.fetchOne(from, fetchClauses)

CoreStore/Internal/NSManagedObjectContext+Setup.swift

@@ -46,7 +46,7 @@ internal extension NSManagedObjectContext {
         }
         set {
             
-            if self.parentContext != nil {
+            guard self.parentContext == nil else {
                 
                 return
             }

CoreStore/Internal/NSManagedObjectContext+Transaction.swift

@@ -71,7 +71,7 @@ internal extension NSManagedObjectContext {
         
         self.performBlockAndWait { [unowned self] () -> Void in
             
-            if !self.hasChanges {
+            guard self.hasChanges else {
                 
                 return
             }
@@ -115,7 +115,7 @@ internal extension NSManagedObjectContext {
         
         self.performBlock { () -> Void in
             
-            if !self.hasChanges {
+            guard self.hasChanges else {
                 
                 if let completion = completion {
                     

CoreStore/Internal/NSManagedObjectModel+Setup.swift

@@ -192,8 +192,10 @@ internal extension NSManagedObjectModel {
     
     @nonobjc internal subscript(metadata: [String: AnyObject]) -> NSManagedObjectModel? {
         
-        if let modelHashes = metadata[NSStoreModelVersionHashesKey] as? [String : NSData] {
+        guard let modelHashes = metadata[NSStoreModelVersionHashesKey] as? [String : NSData] else {
             
+            return nil
+        }
         for modelVersion in self.modelVersions ?? [] {
             
             if let versionModel = self[modelVersion] where modelHashes == versionModel.entityVersionHashesByName {
@@ -201,7 +203,6 @@ internal extension NSManagedObjectModel {
                 return versionModel
             }
         }
-        }
         return nil
     }
     

CoreStore/Migrating/DataStack+Migration.swift

@@ -117,15 +117,8 @@ public extension DataStack {
         let coordinator = self.coordinator;
         if let store = coordinator.persistentStoreForURL(fileURL) {
             
-            if store.type == NSSQLiteStoreType
+            guard store.type == NSSQLiteStoreType
-                && store.configurationName == (configuration ?? Into.defaultConfigurationName) {
+                && store.configurationName == (configuration ?? Into.defaultConfigurationName) else {
-                    
-                    GCDQueue.Main.async {
-                        
-                        completion(PersistentStoreResult(store))
-                    }
-                    return nil
-            }
                     
                     let error = NSError(coreStoreErrorCode: .DifferentPersistentStoreExistsAtURL)
                     CoreStore.handleError(
@@ -135,16 +128,19 @@ public extension DataStack {
                     throw error
             }
             
-        let fileManager = NSFileManager.defaultManager()
+            GCDQueue.Main.async {
-        do {
                 
-            try fileManager.createDirectoryAtURL(
+                completion(PersistentStoreResult(store))
+            }
+            return nil
+        }
+        
+        let fileManager = NSFileManager.defaultManager()
+        _ = try? fileManager.createDirectoryAtURL(
             fileURL.URLByDeletingLastPathComponent!,
             withIntermediateDirectories: true,
             attributes: nil
         )
-        }
-        catch _ { }
         
         do {
             

CoreStore/Migrating/MigrationChain.swift

@@ -166,13 +166,11 @@ public struct MigrationChain: NilLiteralConvertible, StringLiteralConvertible, D
         var valid = true
         for version in elements {
             
-            if let lastVersion = lastVersion {
+            if let lastVersion = lastVersion,
-                
+                let _ = versionTree.updateValue(version, forKey: lastVersion) {
-                if let _ = versionTree.updateValue(version, forKey: lastVersion) {
                     
                     valid = false
             }
-            }
             lastVersion = version
         }
         
@@ -203,12 +201,12 @@ public struct MigrationChain: NilLiteralConvertible, StringLiteralConvertible, D
     
     internal func nextVersionFrom(version: String) -> String? {
         
-        if let nextVersion = self.versionTree[version] where nextVersion != version {
+        guard let nextVersion = self.versionTree[version] where nextVersion != version else {
             
-            return nextVersion
-        }
             return nil
         }
+        return nextVersion
+    }
     
     
     // MARK: Private

CoreStore/Observing/ListMonitor.swift

@@ -321,10 +321,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorWillChange(monitor)
+                    return
                 }
+                observer.listMonitorWillChange(monitor)
             }
         )
         self.registerChangeNotification(
@@ -333,10 +334,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorDidChange(monitor)
+                    return
                 }
+                observer.listMonitorDidChange(monitor)
             }
         )
     }
@@ -367,10 +369,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorWillChange(monitor)
+                    return
                 }
+                observer.listMonitorWillChange(monitor)
             }
         )
         self.registerChangeNotification(
@@ -379,10 +382,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorDidChange(monitor)
+                    return
                 }
+                observer.listMonitorDidChange(monitor)
             }
         )
         
@@ -392,15 +396,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didInsertObject: object,
                     toIndexPath: newIndexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didDeleteObject,
@@ -408,15 +413,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didDeleteObject: object,
                     fromIndexPath: indexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didUpdateObject,
@@ -424,15 +430,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didUpdateObject: object,
                     atIndexPath: indexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didMoveObject,
@@ -440,8 +447,10 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didMoveObject: object,
@@ -449,7 +458,6 @@ public final class ListMonitor<T: NSManagedObject> {
                     toIndexPath: newIndexPath!
                 )
             }
-            }
         )
     }
     
@@ -479,10 +487,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorWillChange(monitor)
+                    return
                 }
+                observer.listMonitorWillChange(monitor)
             }
         )
         self.registerChangeNotification(
@@ -491,10 +500,11 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.listMonitorDidChange(monitor)
+                    return
                 }
+                observer.listMonitorDidChange(monitor)
             }
         )
         
@@ -504,15 +514,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didInsertObject: object,
                     toIndexPath: newIndexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didDeleteObject,
@@ -520,15 +531,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                  
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didDeleteObject: object,
                     fromIndexPath: indexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didUpdateObject,
@@ -536,15 +548,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didUpdateObject: object,
                     atIndexPath: indexPath!
                 )
             }
-            }
         )
         self.registerObjectNotification(
             &NotificationKey.didMoveObject,
@@ -552,8 +565,10 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object, indexPath, newIndexPath) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didMoveObject: object,
@@ -561,7 +576,6 @@ public final class ListMonitor<T: NSManagedObject> {
                     toIndexPath: newIndexPath!
                 )
             }
-            }
         )
         
         self.registerSectionNotification(
@@ -570,15 +584,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, sectionInfo, sectionIndex) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didInsertSection: sectionInfo,
                     toSectionIndex: sectionIndex
                 )
             }
-            }
         )
         self.registerSectionNotification(
             &NotificationKey.didDeleteSection,
@@ -586,15 +601,16 @@ public final class ListMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, sectionInfo, sectionIndex) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
+                    return
+                }
                 observer.listMonitor(
                     monitor,
                     didDeleteSection: sectionInfo,
                     fromSectionIndex: sectionIndex
                 )
             }
-            }
         )
     }
     
@@ -686,10 +702,11 @@ public final class ListMonitor<T: NSManagedObject> {
                 object: self,
                 closure: { [weak self] (note) -> Void in
                     
-                    if let strongSelf = self {
+                    guard let strongSelf = self else {
                         
-                        callback(monitor: strongSelf)
+                        return
                     }
+                    callback(monitor: strongSelf)
                 }
             ),
             forKey: notificationKey,
@@ -705,10 +722,12 @@ public final class ListMonitor<T: NSManagedObject> {
                 object: self,
                 closure: { [weak self] (note) -> Void in
                     
-                    if let strongSelf = self,
+                    guard let strongSelf = self,
                         let userInfo = note.userInfo,
-                        let object = userInfo[UserInfoKeyObject] as? T {
+                        let object = userInfo[UserInfoKeyObject] as? T else {
                             
+                            return
+                    }
                     callback(
                         monitor: strongSelf,
                         object: object,
@@ -716,7 +735,6 @@ public final class ListMonitor<T: NSManagedObject> {
                         newIndexPath: userInfo[UserInfoKeyNewIndexPath] as? NSIndexPath
                     )
                 }
-                }
             ),
             forKey: notificationKey,
             inObject: observer
@@ -731,18 +749,19 @@ public final class ListMonitor<T: NSManagedObject> {
                 object: self,
                 closure: { [weak self] (note) -> Void in
                     
-                    if let strongSelf = self,
+                    guard let strongSelf = self,
                         let userInfo = note.userInfo,
                         let sectionInfo = userInfo[UserInfoKeySectionInfo] as? NSFetchedResultsSectionInfo,
-                        let sectionIndex = (userInfo[UserInfoKeySectionIndex] as? NSNumber)?.integerValue {
+                        let sectionIndex = (userInfo[UserInfoKeySectionIndex] as? NSNumber)?.integerValue else {
                             
+                            return
+                    }
                     callback(
                         monitor: strongSelf,
                         sectionInfo: sectionInfo,
                         sectionIndex: sectionIndex
                     )
                 }
-                }
             ),
             forKey: notificationKey,
             inObject: observer

CoreStore/Observing/ObjectMonitor.swift

@@ -28,20 +28,6 @@ import CoreData
 import GCDKit
 
 
-private let ObjectMonitorWillChangeObjectNotification = "ObjectMonitorWillChangeObjectNotification"
-private let ObjectMonitorDidDeleteObjectNotification = "ObjectMonitorDidDeleteObjectNotification"
-private let ObjectMonitorDidUpdateObjectNotification = "ObjectMonitorDidUpdateObjectNotification"
-
-private let UserInfoKeyObject = "UserInfoKeyObject"
-
-private struct NotificationKey {
-    
-    static var willChangeObject: Void?
-    static var didDeleteObject: Void?
-    static var didUpdateObject: Void?
-}
-
-
 // MARK: - ObjectMonitor
 
 /**
@@ -100,10 +86,11 @@ public final class ObjectMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor) -> Void in
                 
-                if let object = monitor.object, let observer = observer {
+                guard let object = monitor.object, let observer = observer else {
                     
-                    observer.objectMonitor(monitor, willUpdateObject: object)
+                    return
                 }
+                observer.objectMonitor(monitor, willUpdateObject: object)
             }
         )
         self.registerObjectNotification(
@@ -112,10 +99,11 @@ public final class ObjectMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak observer] (monitor, object) -> Void in
                 
-                if let observer = observer {
+                guard let observer = observer else {
                     
-                    observer.objectMonitor(monitor, didDeleteObject: object)
+                    return
                 }
+                observer.objectMonitor(monitor, didDeleteObject: object)
             }
         )
         self.registerObjectNotification(
@@ -124,7 +112,10 @@ public final class ObjectMonitor<T: NSManagedObject> {
             toObserver: observer,
             callback: { [weak self, weak observer] (monitor, object) -> Void in
                 
-                if let strongSelf = self, let observer = observer {
+                guard let strongSelf = self, let observer = observer else {
+                    
+                    return
+                }
                 
                 let previousCommitedAttributes = strongSelf.lastCommittedAttributes
                 let currentCommitedAttributes = object.committedValuesForKeys(nil) as! [String: NSObject]
@@ -145,7 +136,6 @@ public final class ObjectMonitor<T: NSManagedObject> {
                     changedPersistentKeys: changedKeys
                 )
             }
-            }
         )
     }
     
@@ -222,10 +212,11 @@ public final class ObjectMonitor<T: NSManagedObject> {
                 object: self,
                 closure: { [weak self] (note) -> Void in
                     
-                    if let strongSelf = self {
+                    guard let strongSelf = self else {
                         
-                        callback(monitor: strongSelf)
+                        return
                     }
+                    callback(monitor: strongSelf)
                 }
             ),
             forKey: notificationKey,
@@ -241,15 +232,13 @@ public final class ObjectMonitor<T: NSManagedObject> {
                 object: self,
                 closure: { [weak self] (note) -> Void in
                     
-                    if let strongSelf = self,
+                    guard let strongSelf = self,
                         let userInfo = note.userInfo,
-                        let object = userInfo[UserInfoKeyObject] as? T {
+                        let object = userInfo[UserInfoKeyObject] as? T else {
                             
-                            callback(
+                            return
-                                monitor: strongSelf,
-                                object: object
-                            )
                     }
+                    callback(monitor: strongSelf, object: object)
                 }
             ),
             forKey: notificationKey,
@@ -352,3 +341,17 @@ private final class FetchedResultsControllerDelegate: NSObject, NSFetchedResults
         self.fetchedResultsController?.delegate = nil
     }
 }
+
+
+private let ObjectMonitorWillChangeObjectNotification = "ObjectMonitorWillChangeObjectNotification"
+private let ObjectMonitorDidDeleteObjectNotification = "ObjectMonitorDidDeleteObjectNotification"
+private let ObjectMonitorDidUpdateObjectNotification = "ObjectMonitorDidUpdateObjectNotification"
+
+private let UserInfoKeyObject = "UserInfoKeyObject"
+
+private struct NotificationKey {
+    
+    static var willChangeObject: Void?
+    static var didDeleteObject: Void?
+    static var didUpdateObject: Void?
+}

CoreStore/Setting Up/DataStack.swift

@@ -189,11 +189,8 @@ public final class DataStack {
         let coordinator = self.coordinator;
         if let store = coordinator.persistentStoreForURL(fileURL) {
             
-            if store.type == NSSQLiteStoreType
+            guard store.type == NSSQLiteStoreType
-                && store.configurationName == (configuration ?? Into.defaultConfigurationName) {
+                && store.configurationName == (configuration ?? Into.defaultConfigurationName) else {
-                    
-                    return store
-            }
                     
                     let error = NSError(coreStoreErrorCode: .DifferentPersistentStoreExistsAtURL)
                     CoreStore.handleError(
@@ -204,16 +201,15 @@ public final class DataStack {
                     throw error
             }
             
-        let fileManager = NSFileManager.defaultManager()
+            return store
-        do {
+        }
         
-            try fileManager.createDirectoryAtURL(
+        let fileManager = NSFileManager.defaultManager()
+        _ = try? fileManager.createDirectoryAtURL(
             fileURL.URLByDeletingLastPathComponent!,
             withIntermediateDirectories: true,
             attributes: nil
         )
-        }
-        catch _ { }
         
         var store: NSPersistentStore?
         var storeError: NSError?
@@ -377,11 +373,7 @@ public final class DataStack {
         
         for store in self.coordinator.persistentStores {
             
-            do {
+            _ = try? self.coordinator.removePersistentStore(store)
-                
-                try self.coordinator.removePersistentStore(store)
-            }
-            catch _ { }
         }
     }
 }