diff -r 28392c9a969f -r e7a464fb6d39 Source/GGBLayer.h
--- a/Source/GGBLayer.h	Mon Jul 14 21:00:15 2008 -0700
+++ b/Source/GGBLayer.h	Sun Jan 11 00:02:27 2009 -0800
@@ -43,6 +43,17 @@
     and update every other layer that shares the same style dictionary. */
 - (void) setValue: (id)value ofStyleProperty: (NSString*)prop;
 
+/** Send a message to all sublayers in my tree */
+- (void) makeSublayersPerformSelector: (SEL)selector withObject: (id)object;
+
+@property (readonly) CATransform3D aggregateTransform;
+
+/** Call this to notify all sublayers that their aggregate transform has changed. */
+- (void) changedTransform;
+
+/** Called to notify that a superlayer's transform has changed. */
+- (void) aggregateTransformChanged;
+
 @end
 
 
@@ -57,3 +68,5 @@
 void EndDisableAnimations(void);
 
 CGColorRef GetEffectiveBackground( CALayer *layer );
+
+NSString* StringFromTransform3D( CATransform3D xform );