def METHOD_NAME():
    def layout_fn(node):
        if node.props.get('gname'):
            gname= node.props.get('gname')
            color = node.props.get('gname_color')
            gname_face = TextFace(gname, color=color)
            if node.is_leaf:
                node.add_face(gname_face, column = 1, position = "aligned")
            else:
                node.add_face(gname_face, column = 1, position = "aligned", collapsed_only=True)
    layout_fn.__name__ = 'Gene names'
    layout_fn.contains_aligned_face = True
    return layout_fn