function varnumimport { varnum } from "https://dotland.deno.dev/std@0.116.0/encoding/binary.ts"; varnum(b: Uint8Array, o?: VarnumOptions): number | nullDecodes a number from b. If o.bytes is shorter than sizeof(o.dataType), returns null. Decodes a number from b. If o.bytes is shorter than sizeof(o.dataType), returns null. o.dataType defaults to "int32". Parametersb: Uint8Arrayoptionalo: VarnumOptions = [UNSUPPORTED]Returnsnumber | null