super( element, thePropDefn );  assert thePropDefn.getType( ) instanceof ColorPropertyType;
super( element, memberRef ); assert memberRef.getMemberDefn( ).getType( ) instanceof ColorPropertyType;
	public ColorHandle( DesignElementHandle element,			ElementPropertyDefn thePropDefn )	{		super( element, thePropDefn );		assert thePropDefn.getType( ) instanceof ColorPropertyType;	}