:meth:`WMessengerOnionSessionFlowProto.iterator` implementation

def iterator(self, envelope):
		""" :meth:`WMessengerOnionSessionFlowProto.iterator` implementation
		"""
		iterator = WMessengerOnionSessionFlowSequence.FlowSequenceIterator(
			WMessengerOnionSessionFlowProto.IteratorInfo(''), *self.__flows
		)
		return iterator.next(envelope)