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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.import type {  BinaryOptionsArgument,  FileOptionsArgument,  TextOptionsArgument,} from "../_fs_common.ts";import { readFile as readFileCallback } from "../_fs_readFile.ts";
export function readFile(  path: string | URL,  options: TextOptionsArgument,): Promise<string>;export function readFile(  path: string | URL,  options?: BinaryOptionsArgument,): Promise<Uint8Array>;export function readFile(  path: string | URL,  options?: FileOptionsArgument,): Promise<string | Uint8Array> {  return new Promise((resolve, reject) => {    readFileCallback(path, options, (err, data): void => {      if (err) return reject(err);      if (data == null) {        return reject(new Error("Invalid state: data missing, but no error"));      }      resolve(data);    });  });}