Support asciitree 0.2 API.

    This function solely exist to not break old code (using asciitree 0.2).
    Its use is deprecated.

def draw_tree(node,
              child_iter=lambda n: n.children,
              text_str=str):
    """Support asciitree 0.2 API.

    This function solely exist to not break old code (using asciitree 0.2).
    Its use is deprecated."""
    return LeftAligned(traverse=Traversal(get_text=text_str,
                                          get_children=child_iter),
                       draw=LegacyStyle())(node)