function varnumimport { varnum } from "https://deno.land/std@0.55.0/encoding/binary.ts"; varnum(b: Uint8Array, o?: VarnumOptions): number | nullDecode a number from b, and return it as a number. Data-type defaults to int32. Returns null if b is too short for the data-type given in o. Parametersb: Uint8Arrayoptionalo: VarnumOptions = [UNSUPPORTED]Returnsnumber | null