Range controller registers to rendering engine and extern to full range if needed

AsyncDisplayKit/ASDisplayNode.mm

@@ -29,6 +29,7 @@
 #import "ASCellNode.h"
 
 NSInteger const ASDefaultDrawingPriority = ASDefaultTransactionPriority;
+NSString * const ASRenderingEngineDidDisplayScheduledNodesNotification = @"ASRenderingEngineDidDisplayScheduledNodes";
 
 @interface _ASDisplayNodePosition : NSObject
 
@@ -279,6 +280,8 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
       for (ASDisplayNode *node in displayingNodes) {
         [node __recursivelyTriggerDisplayAndBlock:NO];
       }
+      [[NSNotificationCenter defaultCenter] postNotificationName:ASRenderingEngineDidDisplayScheduledNodesNotification
+                                                          object:nil];
     });
   }
 }