/** * @private */Ext.define('Ext.grid.plugin.header.DragZone', { extend: 'Ext.grid.plugin.grouping.DragZone', handle: '.' + Ext.baseCSSPrefix + 'gridcolumn', internalColConfig: 'isGridColumn', beforeDragStart: function(info) { var ret = this.callParent([info]), col = info.data.column; return ret !== false && col.getDraggable(); } });