<AtNavBar
onClickRgIconSt={this.handleClick}
onClickRgIconNd={this.handleClick}
onClickLeftIcon={this.handleClick}
color='#000'
title='NavBar 导航栏示例'
rightFirstIconType='bullet-list'
rightSecondIconType=‘’
leftIconType='chevron-left'
/>
其中 rightSecondIconType=‘’怎么引用三方图标，我看参数可以传对象，格式怎么写