Return message header.

		:param invert_hello: whether to return the original header (in case of False value) or reversed \
		one (in case of True value).
		:return: bytes

def hello_message(self, invert_hello=False):
		""" Return message header.

		:param invert_hello: whether to return the original header (in case of False value) or reversed \
		one (in case of True value).
		:return: bytes
		"""
		if invert_hello is False:
			return self.__gouverneur_message

		hello_message = []
		for i in range(len(self.__gouverneur_message) - 1, -1, -1):
			hello_message.append(self.__gouverneur_message[i])
		return bytes(hello_message)