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diff --git a/UnitTesting/GTMCALayer+UnitTesting.h b/UnitTesting/GTMCALayer+UnitTesting.h
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+//
+//  GTMCALayer+UnitTesting.h
+//
+//  Code for making unit testing of graphics/UI easier. Generally you
+//  will only want to look at the macros:
+//    GTMAssertDrawingEqualToFile
+//    GTMAssertViewRepEqualToFile
+//  and the protocol GTMUnitTestCALayerDrawer. When using these routines
+//  make sure you are using device colors and not calibrated/generic colors
+//  or else your test graphics WILL NOT match across devices/graphics cards.
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <QuartzCore/QuartzCore.h>
+#import "GTMNSObject+UnitTesting.h"
+
+//  Category for making unit testing of graphics/UI easier.
+
+//  Allows you to take a state of a view. Supports both image and state.
+//  See GTMNSObject+UnitTesting.h for details.
+@interface CALayer (GTMUnitTestingAdditions) <GTMUnitTestingImaging>
+//  Returns whether gtm_unitTestEncodeState should recurse into sublayers
+//
+//  Returns:
+//    should gtm_unitTestEncodeState pick up sublayer state.
+- (BOOL)gtm_shouldEncodeStateForSublayers;
+@end
+
+@interface NSObject (GTMCALayerUnitTestingDelegateMethods)
+// Delegate method that allows a delegate for a layer to
+// decide whether we should recurse 
+- (BOOL)gtm_shouldEncodeStateForSublayersOfLayer:(CALayer*)layer;
+@end