public void addMapMode(IconToggleButton b) {
if (b.getAction() instanceof MapMode) {
mapModes.add((MapMode) b.getAction());
} else throw new IllegalArgumentException("MapMode action must be subclass of MapMode");
allMapModeButtons.add(b);
toolBarActionsGroup.add(b);
toolBarActions.add(b);
b.applyButtonHiddenPreferences();
b.setInheritsPopupMenu(true);
}
