def METHOD_NAME(self, property):
    """
    Getter for custom properties
    """
    if property.name == 'icon-name':
        return self.__icon_name
    elif property.name == 'icon-size':
        return self.__icon_size
    elif property.name == 'pixbuf':
        return self.__pixbuf
    elif property.name == 'render-prelit':
        return self.__render_prelit
    else:
        raise AttributeError('unknown property %s' % property.name)