4.x
4.x: Cleanup; build, safevarargs, small typos (#8183)
4.x: Convert from JUnit 4 to JUnit 6 (#8202)
4.x: Streamable +blockingFirst,last[OrError],skip ,S.flattenAsStreamable (#8229)
4.x: Streamable: +delay +timeout +zip +onErrorResumeNext, cleanup (#8216)
4.x: Streamable ~ take native implementation (#8226)
4.x: Streamable optimizations 2026.07.21 (#8254)
4.x: Streamable + takeUntil + groupBy + refactor + helpers (#8215)