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Summary: Closes https://github.com/facebook/flow/pull/2596

Differential Revision: D3995746

Pulled By: mroch

fbshipit-source-id: b60548072a871cf6c3f8d3d285dd6315428a0e22

gabelevi/flow,popham/flow,AgentME/flow,TiddoLangerak/flow,MichaelDeBoey/flow,TiddoLangerak/flow,AgentME/flow,AprilArcus/flow,samwgoldman/flow,JonathanUsername/flow,facebook/flow,JonathanUsername/flow,popham/flow,nmote/flow,popham/flow,jgrund/flow,ForbesLindesay/flow,gabelevi/flow,nmote/flow,nmote/flow,gabro/flow,JonathanUsername/flow,fletcherw/flow,ylu1317/flow,AgentME/flow,nmote/flow,JonathanUsername/flow,AgentME/flow,jgrund/flow,jgrund/flow,jamesgpearce/flow,JonathanUsername/flow,samwgoldman/flow,fletcherw/flow,JonathanUsername/flow,popham/flow,MichaelDeBoey/flow,mroch/flow,fletcherw/flow,gabelevi/flow,MichaelDeBoey/flow,gabro/flow,mroch/flow,ylu1317/flow,popham/flow,ForbesLindesay/flow,jamesgpearce/flow,jamesgpearce/flow,ForbesLindesay/flow,facebook/flow,samwgoldman/flow,samwgoldman/flow,mroch/flow,gabro/flow,AprilArcus/flow,gabelevi/flow,gabelevi/flow,jamesgpearce/flow,mroch/flow,JonathanUsername/flow,AprilArcus/flow,jamesgpearce/flow,mroch/flow,popham/flow,claudiopro/flow,facebook/flow,nmote/flow,TiddoLangerak/flow,facebook/flow,mroch/flow,TiddoLangerak/flow,mroch/flow,popham/flow,gabelevi/flow,facebook/flow,gabelevi/flow,samwgoldman/flow,jamesgpearce/flow,ForbesLindesay/flow,claudiopro/flow,TiddoLangerak/flow,facebook/flow,MichaelDeBoey/flow,facebook/flow,AprilArcus/flow,MichaelDeBoey/flow,claudiopro/flow,ylu1317/flow,jgrund/flow,AprilArcus/flow,gabro/flow,fletcherw/flow,gabro/flow,AgentME/flow,AprilArcus/flow,ForbesLindesay/flow,ylu1317/flow,fletcherw/flow,nmote/flow,jgrund/flow,samwgoldman/flow,samwgoldman/flow,ylu1317/flow,jamesgpearce/flow,claudiopro/flow,fletcherw/flow,ForbesLindesay/flow,claudiopro/flow,nmote/flow,gabro/flow,jgrund/flow