Support https://wiki.php.net/rfc/arbitrary_static_variable_initializers natively in PHP 8.3 emitter. * * * Currently, this functionality is emulated by using the following, see [implementation status](https://github.com/xp-framework/compiler/wiki/Implementation-status): ```php use util\Date; // What gets written function start() { static $now= new Date(); var_dump($now); } // What is emitted function start() { static $now; $now??= new Date(); var_dump($now); } ```