export declare function readFileNames(dir: string): string[];
export declare function copyStaticFile(cwd: string, fileRelativePath: string, outdir: string): Promise<string | undefined>;
export declare function copyFolderRecursiveSync(source: string, target: string): void;
export declare function ensureDir(path: string): string;
export declare function fileExistsAsync(path: string): Promise<boolean>;
export declare class FileNotFoundError extends Error {
    filePath: string;
    constructor(message: any, filePath: string);
}
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