Send a state event to the room.

        Args:
            event_type (str): The type of event that you are sending.
            content (): An object with the content of the message.
            state_key (str, optional): A unique key to identify the state.

def send_state_event(self, event_type, content, state_key=""):
        """Send a state event to the room.

        Args:
            event_type (str): The type of event that you are sending.
            content (): An object with the content of the message.
            state_key (str, optional): A unique key to identify the state.
        """
        return self.client.api.send_state_event(
            self.room_id,
            event_type,
            content,
            state_key
        )