CodeScanner.getFunctionHandler has invalid return value

[JVDProd]

The function getFunctionHandler in the Scanner/CodeScanner-class has a defined return type of "?callable".
However, the actual return value is ?array (see line 93: null or [$this, $handler]).
It seems to be solved when "[$this, $handler]" is replaced by "$handler".

[oscarotero]

This is correct. An array containing a class name or an object in index 0 and the method name in index 1 are also callables.
See https://www.php.net/manual/en/language.types.callable.php