code: func (l *List) Next() {
  	max := len(l.scope) - 1
  
  	if l.cursor < max {
  		l.cursor++
  	}
  
  	if l.start+l.size <= l.cursor {
  		l.start = l.cursor - l.size + 1
  	}
  }
docs: // Next moves the visible list forward one item. If the selected item is out of
  // view, the new select item becomes the first visible item. If the list is
  // already at the bottom, nothing happens.