def is_child_of(self, node):
        """
        :returns: ``True`` is the node if a child of another node given as an
            argument, else, returns ``False``
        """
        return (self.path.startswith(node.path) and
                self.depth == node.depth + 1)
:returns: ``True`` is the node if a child of another node given as an
            argument, else, returns ``False``