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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 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
        )