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I have third-party sdk which uses multi-shot callbacks extensively, in most cases those callbacks return primitive data types. To implement business logic rules I want to use flows with domain layer models. To do that I plan to use `callbackFlow` for every callback (tens or even hundreds of them), and then to use `combine` to produce models of domain layer (each model uses data from up to 10 different callbacks). Is this the best way to achieve that or I miss something and there is better approach?

Sounds good, keep in mind `combine` will only fire once all input flow sent at least 1 value.

Absolutely. Rule of thumb: Do the absolute minimum in `callbackFlow { }` and rather add transforms downstream.