Unbind a socket from a formatted endpoint.
Returns 0 if OK, -1 if the endpoint was invalid or the function
isn't supported.

def unbind(self, format, *args):
        """
        Unbind a socket from a formatted endpoint.
Returns 0 if OK, -1 if the endpoint was invalid or the function
isn't supported.
        """
        return lib.zsock_unbind(self._as_parameter_, format, *args)