Doxygen API lacks classes of namespace "tvm::codegen"?

From the official document web page https://tvm.apache.org/docs/api/links.html, we can find the C++ doyxgen API, but in the doyxgen web page there isn’t any classes of namespace “tvm::codegen”, such as “tvm::codegen::CodeGenC”, “tvm::codegen::CodeGenCUDA”.

If user don’t have code analyzing tool like " Source Insight", “Understand”, C++ Doxygen document is very good place to browse the TVM source code, such as inheritance relationship like below figure shown.

Why there isn’t any classes of namespace “tvm::codegen”? Thanks.

From browsing the source code, I found that the doxygen documents are controled by “docs/Doxyfile”, from the configuration file, why only the “include/tvm” is set to “INPUT”? It seems that we only decide to generate the doxygen documents for header files now, is there some reason for that? @tqchen Thanks.