type SizeUnit = 'MB' | 'GB'; export declare function checkFullAccess(dest: string, throwError?: boolean): boolean; export declare function checkReadable(dest: string, throwError?: boolean): boolean; export declare function isDirectory(dest: string): boolean; export declare function formateFileSize(size: number, unit: SizeUnit): string; export declare function delSync(patterns: string | readonly string[]): void; export {};