Mark the base class of NoFutureInSplitter as public
Mark the base class of NoFutureInSplitter as public

Summary: Because every other exception is already marked as public.

Reviewed By: yfeldblum

Differential Revision: D6275414

fbshipit-source-id: 8e1fc4ceafedbdb44733ab57aecb6050c4160994

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