How to use the messagebird.conversation_message.ConversationMessage function in messagebird

def read_message(self, message_id):
        uri = CONVERSATION_MESSAGES_PATH + '/' + str(message_id)
        return ConversationMessage().load(self.client.request(uri))

def create_message(self, conversation_id, message_create_request):
        uri = CONVERSATION_PATH + '/' + str(conversation_id) + '/' + CONVERSATION_MESSAGES_PATH
        return ConversationMessage().load(self.client.request(uri, 'POST', message_create_request))

def conversation_read_message(self, message_id):
        uri = CONVERSATION_MESSAGES_PATH + '/' + str(message_id)
        return ConversationMessage().load(self.request(uri, 'GET', None, CONVERSATION_TYPE))

def conversation_create_message(self, conversation_id, message_create_request):
        uri = CONVERSATION_PATH + '/' + str(conversation_id) + '/' + CONVERSATION_MESSAGES_PATH
        return ConversationMessage().load(self.request(uri, 'POST', message_create_request, CONVERSATION_TYPE))

def items(self, value):
        items = []
        if isinstance(value, list):
            for item in value:
                items.append(ConversationMessage().load(item))

        self._items = items