Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/AsyncDisplayKit/Source/ASWeakProxy.h

@@ -0,0 +1,32 @@
+//
+//  ASWeakProxy.h
+//  Texture
+//
+//  Copyright (c) Facebook, Inc. and its affiliates.  All rights reserved.
+//  Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc.  All rights reserved.
+//  Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#import <Foundation/Foundation.h>
+#import <AsyncDisplayKit/ASBaseDefines.h>
+
+AS_SUBCLASSING_RESTRICTED
+@interface ASWeakProxy : NSProxy
+
+/**
+ * @return target The target which will be forwarded all messages sent to the weak proxy.
+ */
+@property (nonatomic, weak, readonly) id target;
+
+/**
+ * An object which forwards messages to a target which it weakly references
+ *
+ * @discussion This class is useful for breaking retain cycles. You can pass this in place
+ * of the target to something which creates a strong reference. All messages sent to the
+ * proxy will be passed onto the target.
+ *
+ * @return an instance of ASWeakProxy
+ */
++ (instancetype)weakProxyWithTarget:(id)target NS_RETURNS_RETAINED;
+
+@end