code: function scrollToOption(instance, optionIndex) {
      const ui = instance._root
      if (ui.clientHeight >= ui.scrollHeight) {
        return
      }
  
      const uiBounds = ui.getBoundingClientRect()
      const options = instance._root.querySelectorAll('[data-szn-options--option]')
      const optionBounds = options[optionIndex].getBoundingClientRect()
      if (optionBounds.top >= uiBounds.top && optionBounds.bottom <= uiBounds.bottom) {
        return
      }
  
      const delta = optionBounds.top < uiBounds.top ?
        optionBounds.top - uiBounds.top
        :
        optionBounds.bottom - uiBounds.bottom
      ui.scrollTop += delta
    }
docs: Scrolls, only if necessary, the UI of the provided szn-options element to make the option at the specified index
  fully visible.
  
  @param {SznElements.SznOptions} instance The szn-options element instance.
  @param {number} optionIndex The index of the option to select. The index must be a non-negative integer and cannot
  be greater than the total number of options.