def rd.cut.if
import bend-kit-runner@0.13.0.1/runner.bend as Runnerimport Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes
683def rd.cut.if(ok: Bool, b: Bytes.Bytes, +at: U32, +n: U32) -> Maybe<&1, Rd & Bytes.Bytes>:
684 match ok:
685 case False{}:
686 None{}
687 case True{}:
688 rd.cut.got(at, n, Bytes.slice(b, at, n))