def get_one(self, trigger_id):

        """
        List trigger by id.

        Handle:
            GET /triggers/1
        """
        trigger_db = TriggerController.__get_by_id(trigger_id)
        trigger_api = TriggerAPI.from_model(trigger_db)
        return trigger_api

        List trigger by id.

        Handle:
            GET /triggers/1
        
st2api/st2api/controllers/v1/triggers.py