Can not log the incorrect attributes of LadonType instance

Hi

I am using Ladon version 0.8.0
How make the log on server side, I mean to log all request, even with incorrect arguments
For example:
I am calling some SOAP methon [foo], which accept LadonType object [A] with attributes [id and name]. The name is optional but id not. During this my service generate Fault response and sends it to client. How can I handle such situation on server side, I mean if the SOAP method get incorrect args, how can I log this. Should I change the source code ?

Regards