Send message to destination socket as part of a multipart sequence, and
destroy the message after sending it successfully. Note that after a
zmsg_sendm, you must call zmsg_send or another method that sends a final
message part. If the message has no frames, sends nothing but destroys
the message anyhow. Nullifies the caller's reference to the message (as
it is a destructor).

def sendm(self_p, dest):
        """
        Send message to destination socket as part of a multipart sequence, and
destroy the message after sending it successfully. Note that after a
zmsg_sendm, you must call zmsg_send or another method that sends a final
message part. If the message has no frames, sends nothing but destroys
the message anyhow. Nullifies the caller's reference to the message (as
it is a destructor).
        """
        return lib.zmsg_sendm(byref(zmsg_p.from_param(self_p)), dest)