Force the termination of a NETCONF session (not the current one!)

        *session_id* is the session identifier of the NETCONF session to be terminated as a string

def request(self, session_id):
        """Force the termination of a NETCONF session (not the current one!)

        *session_id* is the session identifier of the NETCONF session to be terminated as a string
        """
        node = new_ele("kill-session")
        sub_ele(node, "session-id").text = session_id
        return self._request(node)