protected void setWindowMenuGroup(String group) {
		this.windowMenuGroup = group;
	}
Sets the window menu group.  If the window menu group is null, the corresponding window menu
item will appear in the root menu, otherwise it will appear in a
sub-menu named <code>group</code>.

@param group the name of the window's sub-menu for this provider
Ghidra/Framework/Docking/src/main/java/docking/ComponentProvider.java