docs: def decode(self, envelope, session, **kwargs):
  		""" :meth:`.WMessengerOnionCoderLayerProto.decode` method implementation.
  
  		:param envelope: original envelope
  		:param session: original session
  		:param kwargs: additional arguments
  
  		:return: WMessengerBytesEnvelope
  		"""
  		return WMessengerBytesEnvelope(b64decode(envelope.message()), meta=envelope)