18992 		this._taskLayers = [];  property
19012 			this._taskLayers.push(bar_layer);
19093 		if (this._taskLayers) {
19094 			for (var i = 0; i < this._taskLayers.length; i++) {
19095 				taskRenderer.removeLayer(this._taskLayers[i]);
19099 		this._taskLayers = [];  property
26408 		this._taskLayers = [];  property in Timeline
26444 				this._taskLayers.push(bar_layer);
26476 				this._taskLayers.push(linkLayer);
26531 		if (this._taskLayers) {
26532 			for(var i = 0; i < this._taskLayers.length; i++){
26533 				taskRenderer.removeLayer(this._taskLayers[i]);
26543 		this._taskLayers = [];  property in Timeline