 		private var _progress:Number = 0;
 		private var _delayInit:Boolean = false;
 		private var _pendingInit:Boolean = false;
-		private var _keyToSortIndex:Dictionary;
 		
 		/**
 		 * This function must be called to set the size of the BitmapData buffer.

			for each (var dependency:ILinkableObject in list)
				registerLinkableChild(_dependencies, dependency);
			
			getCallbackCollection(_plotter.filteredKeySet).addImmediateCallback(this, handleKeySetChange, true);
			
			_dependencies.addImmediateCallback(this, asyncStart, true);
			
			linkBindableProperty(_layerSettings.visible, completedBitmap, 'visible');

				_unscaledHeight = height;
				_dependencies.triggerCallbacks();
			}
		}
		
		/**
