ArrayKeyChoiceList deprecated

A list of choices that can be stored in the keys of a PHP array.

PHP arrays accept only strings and integers as array keys. Other scalar types are cast to integers and strings according to the description of {@link toArrayKey()}. This implementation applies the same casting rules for the choices passed to the constructor and to {@link getValuesForChoices()}.

By default, the choices are cast to strings and used as values. Opt