docs: def transmissions(self, status="all"):
          """Get transmissions sent along this Vector.
  
          Status can be "all" (the default), "pending", or "received".
          """
          if status not in ["all", "pending", "received"]:
              raise(ValueError("You cannot get {} transmissions."
                               .format(status) +
                               "Status can only be pending, received or all"))
  
          if status == "all":
              return Transmission\
                  .query\
                  .filter_by(vector_id=self.id,
                             failed=False)\
                  .all()
          else:
              return Transmission\
                  .query\
                  .filter_by(vector_id=self.id,
                             status=status,
                             failed=False)\
                  .all()