code: def save_bt_addr(self, packet, bt_addr):
          
          if isinstance(packet, EddystoneUIDFrame):
              # remove out old mapping
              new_mappings = [m for m in self.eddystone_mappings if m[0] != bt_addr]
              new_mappings.append((bt_addr, packet.properties))
              self.eddystone_mappings = new_mappings
docs: Add to the list of mappings.