If custom visualization class (NG_Visualization) has been defined. This is the method that gets called if navGraph switches away from a graph that links to the visualization class.
如果已定义的自定义可视化类(NG_Visualization)。这是链接的方法被调用,如果navGraph切换出去从图中的可视化类。
See package vignette for more detail.
更多详细信息,请参阅包的小插曲。