Fix linking

submodules/AsyncDisplayKit/Source/ASLayoutSpecPrivate.h

@@ -0,0 +1,37 @@
+//
+//  ASLayoutSpecPrivate.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 <AsyncDisplayKit/ASInternalHelpers.h>
+#import <AsyncDisplayKit/ASThread.h>
+
+#if DEBUG
+  #define AS_DEDUPE_LAYOUT_SPEC_TREE 1
+#else
+  #define AS_DEDUPE_LAYOUT_SPEC_TREE 0
+#endif
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ASLayoutSpec() {
+  AS::RecursiveMutex __instanceLock__;
+  std::atomic <ASPrimitiveTraitCollection> _primitiveTraitCollection;
+  ASLayoutElementStyle *_style;
+  NSMutableArray *_childrenArray;
+}
+
+#if AS_DEDUPE_LAYOUT_SPEC_TREE
+/**
+ * Recursively search the subtree for elements that occur more than once.
+ */
+- (nullable NSHashTable<id<ASLayoutElement>> *)findDuplicatedElementsInSubtree;
+#endif
+
+@end
+
+NS_ASSUME_NONNULL_END