function isUtf8import { isUtf8 } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/is/index.ts"; isUtf8(value?: | HexString | number[] | Buffer | Uint8Array | string | null): booleanParametersoptionalvalue: | HexString | number[] | Buffer | Uint8Array | string | nullReturnsboolean