we can use the following to add radio buttons:

1.   controlP5.addRadioButton("color_mode")
2.            .setPosition(10,10)
3.            .setItemWidth(15)
4.            .setItemHeight(15)
5.            .addItem("aaa",0)
6.            .addItem("bbb",1)
7.            .addItem("cccc",2)
8.            .activate(0)
9.            ;

but how to add different tooltip for each of the bottons? the following doesn't seem to work ...

1. controlP5.getTooltip().register("color_mode", "color mode");

thanks!