 
   @public func assertingGet(i: Index) -> (KeyType, ValueType) {
     let e = self[i.offset]
-    _precondition(e, "attempting to access Dictionary elements using an invalid Index")
+    _precondition(
+      e, "attempting to access Dictionary elements using an invalid Index")
     return e!
   }
 

  }

  func successor() -> Index {
    _precondition(nextKeyIndex < allKeys.count, "can not advance endIndex forward")
    return _CocoaDictionaryIndex(cocoaDictionary, allKeys, nextKeyIndex + 1)
  }
}

  // NSDictionary subclass.

  // The designated initializer of `NSDictionary`.
  init(
    objects: ConstUnsafePointer<AnyObject?>,
    forKeys: ConstUnsafePointer<Void>, count: Int)
  
  var count: Int { get }
  func objectForKey(aKey: AnyObject?) -> AnyObject?
  func keyEnumerator() -> _SwiftNSEnumerator?
