The implementation of `ChoiceList` was changed heavily. As a result, `ArrayChoiceList` was replaced.

[pawaclawczyk]

• The implementation of ChoiceList was changed heavily. As a result, ArrayChoiceList was replaced. If you have custom classes that extend this class, you must now extend SimpleChoiceList and pass choices to the parent constructor.

  Before:

  class MyChoiceList extends ArrayChoiceList
  {
    protected function load()
    {
        parent::load();
  
        // load choices
  
        $this->choices = $choices;
    }
  }

  After:

  class MyChoiceList extends SimpleChoiceList
  {
    public function __construct()
    {
        // load choices
  
        parent::__construct($choices);
    }
  }

  If you need to load the choices lazily -- that is, as soon as they are accessed for the first time -- you can extend LazyChoiceList instead and load the choices by overriding loadChoiceList().

  class MyChoiceList extends LazyChoiceList
  {
    protected function loadChoiceList()
    {
        // load choices
  
        return new SimpleChoiceList($choices);
    }
  }

  PaddedChoiceList, MonthChoiceList and TimezoneChoiceList were removed. Their functionality was merged into DateType, TimeType and TimezoneType.

  EntityChoiceList was adapted. The methods getEntities(), getEntitiesByKeys(), getIdentifier() and getIdentifierValues() were removed or made private. Instead of the first two, you can now use getChoices() and getChoicesByValues(). For the latter two, no replacement exists.