StreamClass.chunkEvery<S>(): StreamClass<Exclude<S, AnyFailure>[], Extract<S, AnyFailure>>
StreamClass#chunkEvery as a static: Stream.chunkEvery(source, …) is
Stream.from(source).chunkEvery(…).
await Stream.chunkEvery([1, 2, 3], 2).collect(); // [[1, 2], [3]]
StreamClass<Exclude<S, AnyFailure>[], Extract<S, AnyFailure>>