Spring Cloud Openfeign Why pathvariable annotation must have value?

In the PathVariableParameterProcessor (spring-cloud-openfeign-core-2.1.0), we can see the method of processArgument, which is used to process @PathVariable annotation's value, if value is null that will produce error message. But the method has the paramter of method, why we can not get the parameter belongs to the method, and try to get its parameter name to fill the path

Comment From: OlgaMaciaszek

Hello, @MikeSya. Please learn how to properly format code and logs. Also, please upgrade to a supported Spring Cloud OpenFeign version (4.0.4 or 4.1.1) since 2.1.0 has been out of support for a long time. If you try it in your app, you will be able to see that it works already. This is because it's handled under the hood by this method.