let decorater handle async_gen functions
let decorater handle async_gen functions

Reviewed By: c-ryan747

Differential Revision: D16708455

fbshipit-source-id: 71a511139216fa3fd516d32dc9539a5c4e80cddb

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl