docs: def removeStage(self, personID, nextStageIndex):
          """removeStage(string, int)
          Removes the nth next stage
          nextStageIndex must be lower then value of getRemainingStages(personID)
          nextStageIndex 0 immediately aborts the current stage and proceeds to the next stage
          """
          self._connection._beginMessage(
              tc.CMD_SET_PERSON_VARIABLE, tc.REMOVE_STAGE, personID, 1 + 4)
          self._connection._string += struct.pack("!Bi",
                                                  tc.TYPE_INTEGER, nextStageIndex)
          self._connection._sendExact()