code: func (l *ListBox) SelectItem(id int) bool {
  	if len(l.items) <= id || id < 0 {
  		return false
  	}
  
  	l.currSelection = id
  	l.EnsureVisible()
  	return true
  }
docs: // SelectItem selects item which number in the list equals
  // id. If the item exists the ListBox scrolls the list to
  // make the item visible.
  // Returns true if the item is selected successfully