selectable.go
func (s *selectable) FindByLabel(text string) *Selection {
	return newSelection(s.session, s.selectors.Append(target.Label, text).Single())
}
func (s *selectable) FindByLabel(text string) *Selection {
	return newSelection(s.session, s.selectors.Append(target.Label, text).Single())
}
// FindByLabel finds exactly one element by associated label text.