Make the Function for wrapping an object as a Produced instance a singleton, like other similar functions in Producers.
Make the Function for wrapping an object as a Produced instance a singleton, like other similar functions in Producers.

RELNOTES=n/a

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=195603298

ze-pequeno/dagger,cgruber/dagger,ze-pequeno/dagger,cgruber/dagger,ze-pequeno/dagger,dushmis/dagger,cgruber/dagger,dushmis/dagger,google/dagger,google/dagger,ze-pequeno/dagger,google/dagger,google/dagger