Add another stream synthetic class to allowed duplicates
Add another stream synthetic class to allowed duplicates

Reviewed By: agampe

Differential Revision: D28016647

fbshipit-source-id: 25a6bb1b8d9a002318499a4a4f87895236fb5b8d

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex