def cleanup_engine(self, engine):
        scenes = [scene for scene in engine.scenes]
        for scene in scenes:
            engine.close_scene(scene)
        engine.stop()
Validate that the request is properly signed by Dropbox.
dataset/ETHPy150Open enthought/mayavi/integrationtests/mayavi/test_mlab_savefig.py/TestMlabSavefigUnitTest.cleanup_engine--crossover with--dataset/ETHPy150Open dropbox/mdwebhook/app.py/validate_request