func (l *ListBox) AddItem(item string) bool {
	l.items = append(l.items, item)
	return true
}
func (l *ListBox) AddItem(item string) bool {
	l.items = append(l.items, item)
	return true
}
func ( l * ListBox ) AddItem ( item string ) bool { l . items = append ( l . items , item ) return true }
// own methods
// AddItem adds a new item to item list.
// Returns true if the operation is successful
own methods AddItem adds a new item to item list . Returns true if the operation is successful