Export getObservableForRequestInFlight
Export getObservableForRequestInFlight

Summary: I had this in D14981580 and I think it got lost in a rebase - in any case, this exports getObservableForRequestInFlight in relay-runtime.

Reviewed By: alunyov

Differential Revision: D14989053

fbshipit-source-id: e1ac6385ef1e64c2d9f7fb7e600ee93ce36c0b3b

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