@Override
	public void addGroup(RibbonGroup ribbonGroup) {
		if (null == ribbonGroup) {
			throw new IllegalArgumentException("Cannot add RibbonGroup with null value.");
		}
		groups.add(ribbonGroup);
		ribbonGroup.setShowTitle(showGroupTitles);
		ribbonGroup.asWidget().setStyleName(getStyleName() + "Group");
		addMember(ribbonGroup.asWidget());
	}
@ Override public void addGroup ( RibbonGroup ribbonGroup ) { if ( null == ribbonGroup ) { throw new IllegalArgumentException ( "Cannot add RibbonGroup with null value." ) ; } groups . add ( ribbonGroup ) ; ribbonGroup . setShowTitle ( showGroupTitles ) ; ribbonGroup . asWidget ( ) . setStyleName ( getStyleName ( ) + "Group" ) ; addMember ( ribbonGroup . asWidget ( ) ) ; }
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