def lz.insert
import bend-kit-zlib@0.5.1.0/zlib.bend as Zlibimport Base
852# Links position i into the chain for its next three bytes; answers the chain's previous head.
853def lz.insert(z: Lz, +i: U32) -> Lz & U32:
854 lz.ins.of(lz.hash(z, i), i)