function isBase64import { isBase64 } from "https://dotland.deno.dev/x/deno_validator@v0.0.5/mod.ts"; isBase64(str: string, options: any)Parametersstr: stringoptions: anyimport isBase64import { isBase64 } from "https://dotland.deno.dev/x/deno_validator@v0.0.5/mod.ts";