function createGridClipShape(coordSys, seriesModel, cb) {
	        var parallelModel = coordSys.model;
	        var rect = coordSys.getRect();
	        var rectEl = new graphic.Rect({
	            shape: {
	                x: rect.x,
	                y: rect.y,
	                width: rect.width,
	                height: rect.height
	            }
	        });

	        var dim = parallelModel.get('layout') === 'horizontal' ? 'width' : 'height';
	        rectEl.setShape(dim, 0);
	        graphic.initProps(rectEl, {
	            shape: {
	                width: rect.width,
	                height: rect.height
	            }
	        }, seriesModel, cb);
	        return rectEl;
	    }
@file  The file used to draw sankey view
@author  Deqing Li(annong035@gmail.com)