Add a helper method to get wrapper annotation
Add a helper method to get wrapper annotation

Reviewed By: andrii-korotkov

Differential Revision: D38219736

fbshipit-source-id: 5206422846046c5c2d94270c7a8c67cb7f89b889

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift