eZ\Publish\Core\FieldType\DateAndTime\Type::fieldSettingsFromHash PHP Method

    public function fieldSettingsFromHash($fieldSettingsHash)
    {
        $fieldSettings = parent::fieldSettingsFromHash($fieldSettingsHash);
        if (isset($fieldSettings['dateInterval'])) {
            $fieldSettings['dateInterval'] = new DateInterval($fieldSettings['dateInterval']);
        }
        return $fieldSettings;
    }