func (s *FileSequence) SetDirname(dir string) {
	if !strings.HasSuffix(dir, string(filepath.Separator)) {
		dir = dir + string(filepath.Separator)
	}
	s.dir = dir
}
func (s *FileSequence) SetDirname(dir string) {
	if !strings.HasSuffix(dir, string(filepath.Separator)) {
		dir = dir + string(filepath.Separator)
	}
	s.dir = dir
}
func ( s * FileSequence ) SetDirname ( dir string ) { if ! strings . HasSuffix ( dir , string ( filepath . Separator ) ) { dir = dir + string ( filepath . Separator ) } s . dir = dir }
// Set a new dirname for the sequence
Set a new dirname for the sequence