docs: function () {
  			var order = [],
  				el,
  				children = this.el.children,
  				i = 0,
  				n = children.length,
  				options = this.options;
  
  			for (; i < n; i++) {
  				el = children[i];
  				if (_closest(el, options.draggable, this.el)) {
  					order.push(el.getAttribute(options.dataIdAttr) || _generateId(el));
  				}
  			}
  
  			return order;
  		}