function varbigimport { varbig } from "https://deno.land/std@0.53.0/encoding/binary.ts"; varbig(b: Uint8Array, o?: VarbigOptions): bigint | nullDecode an integer from b, and return it as a bigint. Data-type defaults to int64. Returns null if b is too short for the data-type given in o. Parametersb: Uint8Arrayoptionalo: VarbigOptions = [UNSUPPORTED]Returnsbigint | null