diff -r 28392c9a969f -r 4cb50131788f Source/GGBLayer.m
--- a/Source/GGBLayer.m	Mon Jul 14 21:00:15 2008 -0700
+++ b/Source/GGBLayer.m	Thu Jul 31 11:18:13 2008 -0700
@@ -124,7 +124,24 @@
 }
 
 
-#if 0
+- (void) makeSublayersPerformSelector: (SEL)selector withObject: (id)object
+{
+    for( GGBLayer *layer in self.sublayers ) {
+        [layer performSelector: selector withObject: object withObject: nil];
+        [layer makeSublayersPerformSelector: selector withObject: object];
+    }
+}
+
+- (void) changedTransform
+{
+    [self makeSublayersPerformSelector: @selector(aggregateTransformChanged) withObject: nil];
+}
+
+- (void) aggregateTransformChanged
+{
+}
+
+
 - (CATransform3D) aggregateTransform
 {
     CATransform3D xform = CATransform3DIdentity;
@@ -147,7 +164,6 @@
     }
     return str;
 }
-#endif
 
 
 #if TARGET_OS_IPHONE