Pattern = function (image, repeat) {
	        // Should do nothing more in this constructor. Because gradient can be
	        // declard by `color: {image: ...}`, where this constructor will not be called.

	        this.image = image;
	        this.repeat = repeat;

	        // Can be cloned
	        this.type = 'pattern';
	    }
@alias module:zrender/graphic/Group
@constructor
@extends module:zrender/mixin/Transformable
@extends module:zrender/mixin/Eventful