callbag-take-while
👜 Callbag operator which emits values emitted by the source as long as each value satisfies the given predicate, and then completes as soon as predicate is not satisfied.
callbag-concat-with
👜 Callbag operator that emits items given it as arguments after it finishes emitting items emitted by source.
callbag-of
👜 Callbag source factory that emits values specified as arguments.
callbag-defer
👜 Callbag which creates a source from a given factory when sink subscribes.
callbag-to-promise
👜 Callbag operator which converts source to a promise containing last emitted value.
