WIP: object concurrency debugging utilities

Sources/Logging/DefaultLogger.swift

@@ -33,6 +33,11 @@ import Foundation
  */
 public final class DefaultLogger: CoreStoreLogger {
     
+    /**
+     When `true`, all `NSManagedObject` attribute and relationship access will raise an assertion when executed on the wrong transaction/datastack queue. Defaults to `false`.
+     */
+    public var enableObjectConcurrencyDebugging: Bool = false
+    
     /**
      Creates a `DefaultLogger`.
      */