docs: def _frame_received(self, frame):
          """
          Put the frame into the _rx_frames dict with a key of the frame_id.
          """
          try:
              self._rx_frames[frame["frame_id"]] = frame
          except KeyError:
              # Has no frame_id, ignore?
              pass
          _LOGGER.debug("Frame received: %s", frame)
          # Give the frame to any interested functions
          for handler in self._rx_handlers:
              handler(frame)