code: func (win *Window) OptionText(text string, is_active bool) bool {
  	style := &win.ctx.Style
  	state, bounds, fitting := win.widget()
  	if fitting != nil {
  		fitting(toggleWidth(text, toggleOption, &style.Option, style.Font))
  	}
  	if !state {
  		return false
  	}
  	in := win.inputMaybe(state)
  	is_active = doToggle(win, bounds, is_active, text, toggleOption, &style.Option, in, style.Font)
  	return is_active
  }
docs: // OptionText adds a radio button to win. If is_active is true the
  // radio button will be drawn selected. Returns true when the button
  // is clicked once.
  // You are responsible for ensuring that only one radio button is selected at once.