function base64.validateimport { base64 } from "https://deno.land/x/b64@1.1.28/types/base64.d.ts"; const { validate } = base64; validate(encoded: string, urlMode?: boolean): booleanFunction to validate base64 Function to validate base64 Parametersencoded: string Base64 or Base64url encoded data optionalurlMode: boolean If set to true, base64url will be expected Returnsboolean Valid base64/base64url?