def match_trigger(self, message: str) -> str | None:
        """Match a trigger in the message.

        It returns the first trigger that matches the message.
        """
        message = message.lower()
        for trigger in self.triggers:
            if trigger.lower() in message:
                return trigger

        return None
Match a trigger in the message.

        It returns the first trigger that matches the message.
        
openhands/microagent/microagent.py