.copyfile!: (src: PathLike, dst: PathLike,) => NoneType
.copy!: (src: PathLike, dst: PathLike,) => NoneType
.copytree!: (src: PathLike, dst: PathLike,) => NoneType
.rmtree!: (path: PathLike,) => NoneType
.move!: (src: PathLike, dst: PathLike) => NoneType
.which!: (cmd: Str,) => Str or NoneType