function doDispatch(api, brushSelected) {
    if (!api.isDisposed()) {
        var zr = api.getZr();
        zr[DISPATCH_FLAG] = true;
        api.dispatchAction({
            type: 'brushSelect',
            batch: brushSelected
        });
        zr[DISPATCH_FLAG] = false;
    }
}
see module:echarts/component/helper/BrushController
@param {Object} brushOption