///
import * as fs from "fs";
export declare class IO {
static unlinkSync(file: string): void;
static writeFile(wpath: string, data: any): Promise;
static writeFileSync(wpath: string, data: any): void;
static mkDirSync(dir: string): void;
static mkdirsSync(dir: string): void;
static readFileSync(wpath: string): string;
static existsSync(wpath: string): boolean;
static readPackageJson(): object;
static copyFileSync(src: fs.PathLike, dest: fs.PathLike): void;
}