function bytes.findLastIndeximport { bytes } from "https://deno.land/x/aleph@v0.2.28/std.ts"; const { findLastIndex } = bytes; findLastIndex(source: Uint8Array, pat: Uint8Array): numberFind last index of binary pattern from a. If not found, then return -1. Parameterssource: Uint8Arraysource array pat: Uint8Arraypattern to find in source array Returnsnumber