def _prepare_message()

in MessagePayload.py [0:0]


    def _prepare_message(self, d):
        [ d.pop(k) for k in (set(self.preDropKeys) & set(d.keys())) ]
        self.payload = d.copy()
        self.make_message(d)
        [ self.payload.pop(k) for k in (set(self.postDropKeys) & set(self.payload.keys())) ]