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Prefix while inclusive, passing values scaffolding.
extension Publisher {
func prefixInclusive(while predicate: @escaping (Output) -> Bool) -> AnyPublisher<Output, Failure> {
flatMap { value -> AnyPublisher<Output, Failure> in
if predicate(value) {
return Just(value)
.setFailureType(to: Failure.self)
} else {
fatalError("To be implemented.")
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