def request_body(self):
        # By default, Django-esque.
        return self.request.body
List triggerinstance by instance_id.
dataset/ETHPy150Open toastdriven/restless/restless/resources.py/Resource.request_body--crossover with--dataset/ETHPy150Open StackStorm/st2/st2api/st2api/controllers/v1/triggers.py/TriggerInstanceController.get_one