Returns True if a container exists at the specified path,
        otherwise False.

        :param path: str or Path instance
        :return:
        :rtype: bool
        :raises ValueError: A component of path is a field name.

def contains_container(self, path):
        """
        Returns True if a container exists at the specified path,
        otherwise False.

        :param path: str or Path instance
        :return:
        :rtype: bool
        :raises ValueError: A component of path is a field name.
        """
        path = make_path(path)
        try:
            self.get_container(path)
            return True
        except KeyError:
            return False