code: def register_magic_payload(cls, payload_cls, magic_check=None):
          
          if magic_check is None:
              if hasattr(payload_cls, "magic_check"):
                  magic_check = payload_cls.magic_check
              else:
                  raise TypeError("magic_check not specified, and {} has no "
                                  "attribute magic_check".format(payload_cls))
  
          cls.registered_magic_payloads[payload_cls] = magic_check
docs: Registers a payload type that uses magic data.
  
          Traditional payloads require registration of a Bluetooth Company ID
          (requires company membership of the Bluetooth SIG), or a Bluetooth
          Short UUID (requires a once-off payment).
  
          There are alternatives which don't require registration (such as
          128-bit UUIDs), but the biggest consumer of energy in a beacon is the
          radio -- so the energy consumption of a beacon is proportional to the
          number of bytes in a beacon frame.
  
          Some beacon formats side-step this issue by using the Company ID of
          their beacon hardware manufacturer, and adding a "magic data sequence"
          at the start of the Manufacturer Specific Data field.
  
          Examples of this are AltBeacon and GeoBeacon.
  
          For an example of this method in use, see ``scapy.contrib.altbeacon``.
  
          :param Type[Packet] payload_cls:
              A reference to a Packet subclass to register as a payload.
          :param Callable[[bytes], bool] magic_check:
              (optional) callable to use to if a payload should be associated
              with this type. If not supplied, ``payload_cls.magic_check`` is
              used instead.
          :raises TypeError: If ``magic_check`` is not specified,
                             and ``payload_cls.magic_check`` is not implemented.