expose internal RelayConcreteVariables.getOperationVariables
expose internal RelayConcreteVariables.getOperationVariables

Reviewed By: jstejada

Differential Revision: D9724402

fbshipit-source-id: 1a7f2e8c67461e4fa0502803970373539a6e69d6

cpojer/relay,kassens/relay,wincent/relay,facebook/relay,iamchenxin/relay,kassens/relay,yungsters/relay,xuorig/relay,voideanvalue/relay,voideanvalue/relay,facebook/relay,kassens/relay,voideanvalue/relay,xuorig/relay,zpao/relay,facebook/relay,wincent/relay,xuorig/relay,facebook/relay,atxwebs/relay,josephsavona/relay,voideanvalue/relay,kassens/relay,xuorig/relay,yungsters/relay,facebook/relay,wincent/relay,kassens/relay,kassens/relay,facebook/relay,iamchenxin/relay,xuorig/relay,josephsavona/relay,xuorig/relay,wincent/relay,wincent/relay,iamchenxin/relay,yungsters/relay,cpojer/relay,voideanvalue/relay,atxwebs/relay,iamchenxin/relay,dbslone/relay,atxwebs/relay,josephsavona/relay,atxwebs/relay,zpao/relay,cpojer/relay,freiksenet/relay,freiksenet/relay,voideanvalue/relay,dbslone/relay,wincent/relay,freiksenet/relay,cpojer/relay,zpao/relay