def gz.fextra.at
import bend-kit-zlib@0.5.1.0/zlib.bend as Zlibimport Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes
563def gz.fextra.at(m: Maybe<&2, U32>, b: Bytes.Bytes) -> Bytes.Bytes & Maybe<&2, U32>:
564 match m:
565 case None{}:
566 (b, None{})
567 case Some{+off}:
568 gz.xlen(off, Bytes.get.u16le(b, off))