function varbigimport { varbig } from "https://deno.land/std@0.152.0/encoding/binary.ts"; varbig(b: Uint8Array, o?: VarbigOptions): bigint | nullDecodes a bigint from b. If o.bytes is shorter than sizeof(o.dataType), returns null. o.dataType defaults to "int64". Parametersb: Uint8Arrayoptionalo: VarbigOptions = [UNSUPPORTED]Returnsbigint | null