When I execute my test with the last version of packages + PHP 8.3, I have this warning :
1x: Method "JsonSerializable::jsonSerialize()" might add "mixed" as a native return type declaration in the future. Do the same in implementation "OpenApi\Annotations\Operation" now to avoid errors or add an explicit @return annotation to suppress this message.
When I execute my test with the last version of packages + PHP 8.3, I have this warning :