<Multiselect label='Select College' ref="collegeList" onChange={this.handleChange} multiple >
<option value='college1'>college1</option>
<option value='college2'>college2</option>
</Multiselect>
该组件来自https://github.com/skratchdot/react-bootstrap-multiselect
在 handleChange() 函数中应该写什么?