References

summary
public	F isDir(path: string \| Buffer \| URL): Promise<boolean> Whether a file is a directory or not.
public	F byDirname(paths: string[]): Object Group paths by their parent path.
public	F isAscendant(subject: string, descendant: string): boolean Whether a path is an ascendant of another one.
public	F isDescendant(subject: string, ascendant: string): boolean Whether a path is an descendant of another one.
public	F isUniqueAndNotDescendant(path: string, index: number, paths: string[]): boolean Whether a path is unique and does not have any ascendant within an array of paths.
public	V lStat(path: string \| Buffer \| URL, options: Object): Promise<fs.Stats>: * Promisified version of `fs.lstat()`: asynchronous `lstat(2)`.
public	V readDir(path: string \| Buffer \| URL, options: Object): Promise<string[]\|Buffer[]\|fs.Dirent[]>: * Promisified version of `fs.readdir()`: asynchronous `readdir(3)`.
public	V stat(path: string \| Buffer \| URL, options: Object): Promise<fs.Stats>: * Promisified version of `fs.stat()`: asynchronous `stat(2)`.
public	V defaults: Object Default traversing options.
public	V ascendanceRegExp: RegExp Regular expression that matches all "ascendant" paths: '..' '../..' '../../..' etc.