function findLastIndeximport { findLastIndex } from "https://deno.land/x/deno@v0.22.0/std/bytes/mod.ts"; findLastIndex(a: Uint8Array, pat: Uint8Array): numberFind last index of binary pattern from a. If not found, then return -1 * Parametersa: Uint8Arraypat: Uint8ArrayReturnsnumber