� BEGIN ==============
	// 设置多级表头
	groupHeaders: {
 		twoLevel:[
 			{startColumnName: 'testSelect', numberOfColumns: 2, titleText: '二级表头'},
 			{startColumnName: 'testRadio', numberOfColumns:2, titleText:'二级表头2'}
 		],
 		threeLevel:[
 			{startColumnName: 'testSelect', numberOfColumns:4, titleText:'三级表头'}
 		]
	},
	// ================ 设置多级表头 END ==============

	// ================ 分组，小计 BEGIN ==============
	grouping: true, 	// 是否分组显示
