code: def encode(self):
          
  
          slot = 0
          match_op = self.KNOWN_MATCH_NAMES['match_controller']
  
          if not self.controller:
              slot = self.slot
              match_op = self.KNOWN_MATCH_NAMES['match_slot']
  
          return struct.pack("<B6xB", slot, match_op)
docs: Encode this slot identifier into a binary descriptor.
  
          Returns:
              bytes: The 8-byte encoded slot identifier