refactor: DRY with context building and *Impl functions #3656
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The
execute
/executeImpl
andcreateSourceEventStream
/createSourceEventStreamImpl
functions follow the same basic pattern of building the context and using it to run a function. This PR extracts that pattern into a separate function.For good measure, the same pattern in applied to the soon-to-be-deprecated
subscribe
function.Heavier refactoring is on the way from @IvanGoncharov (see #3639 (review)), but in the meantime, this consolidates the common pattern without any breaking changes.