Api\EnumType\PhonebookSortOptionApi::valueIsValid PHP Method

Return true if value is allowed

public static valueIsValid ( mixed $value ) : boolean
$value	mixed	value
return	boolean	true\|false

    public static function valueIsValid($value)
    {
        return $value === null || in_array($value, self::getValidValues(), true);
    }

PhonebookSortOptionApi