next() {
    if (this.position + 1 < this._list.length) {
      this.position++;

      return this.getComponent();
    } else {
      return null;
    }
  }
Move to the next component options in the list, if not already at the end of the
list.
@returns {ComponentOptionsList|null} The next component options the iterator is now
       pointed at. If the iterator is already at the last component options, null
       is returned.