Add extensibility support for ASEnvironmentLayoutOptionsState

AsyncDisplayKit/Layout/ASLayoutableExtensibility.h

@@ -0,0 +1,25 @@
+//
+//  ASLayoutableExtensibility.h
+//  AsyncDisplayKit
+//
+//  Created by Michael Schneider on 3/29/16.
+//  Copyright © 2016 Facebook. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@protocol ASLayoutableExtensibility <NSObject>
+
+/// Currently up to 4 BOOL values
+- (void)setLayoutOptionExtensionBool:(BOOL)value atIndex:(int)idx;
+- (BOOL)layoutOptionExtensionBoolAtIndex:(int)idx;
+
+/// Currently up to 1 NSInteger value
+- (void)setLayoutOptionExtensionInteger:(NSInteger)value atIndex:(int)idx;
+- (NSInteger)layoutOptionExtensionIntegerAtIndex:(int)idx;
+
+/// Currently up to 1 UIEdgeInsets value
+- (void)setLayoutOptionExtensionEdgeInsets:(UIEdgeInsets)value atIndex:(int)idx;
+- (UIEdgeInsets)layoutOptionExtensionEdgeInsetsAtIndex:(int)idx;
+
+@end