To group other objects together. So if I need to show one group of objects
in one case, and another set in a different case, i can put each set of
objects in their own panel. Then I can make the panel i need to show
visible, and make the other one invisible. So instead of keeping a list of
objects I need to make invisible, and going through each one, I could just
do it all in one line. If I end up adding or deleting objects from either
set, this code would not have to change as I am only changing the Visible
property of the panel.