可不可以直接使用proto 里定义的pojo对象，而不定义用@Protobuf 定义的对象？

后端用C++ 实现的，所以已经有proto 定义的IDL 对象了； 但是客户端是java，想用jprotobuf来做客户端，但是提示客户端传递的对象必须使用@Protobuf 标注。
如果能都用proto 来定义对象，那么前后端就统一了。

Start by locating the Java client serialization path and the validation that requires @Protobuf annotations. Check how proto-defined objects are currently handled, then determine whether those objects can be accepted for communication with the C++ backend. Done means the client can use the existing proto-defined objects without duplicating annotated classes and remains interoperable with the backend.

Written by the indexing model from the issue text.