Deprecated: Drupal\enum_field\Plugin\Field\FieldType\EnumItemTrait::getSettableOptions(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead

Problem/Motivation

When using PHP 8.4, the following deprecation notice is displayed:

: Drupal\enum_field\Plugin\Field\FieldType\EnumItemTrait::getSettableOptions(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead in on line

Proposed resolution

Make the argument type nullable.