def flatten_all_paths(self, group_filter=lambda x: True,<EOL>path_filter=lambda x: True,<EOL>path_conversions=CONVERSIONS):
return flatten_all_paths(self.tree.getroot(), group_filter,<EOL>path_filter, path_conversions)<EOL>
Forward the tree of this document into the more general
        flatten_all_paths function and return the result.