const io/fs.ModeDir

4 uses

	io/fs (current package)
		fs.go#L174: 	ModeDir        FileMode = 1 << (32 - 1 - iota) // d: is a directory
		fs.go#L189: 	ModeType = ModeDir | ModeSymlink | ModeNamedPipe | ModeSocket | ModeDevice | ModeCharDevice | ModeIrregular
		fs.go#L223: 	return m&ModeDir != 0

	os
		types.go#L38: 	ModeDir        = fs.ModeDir        // d: is a directory