How can I DeclarationName::dump() in eclipse?

Hello list,

I am trying to debug Clang in Eclipse CDT recently.
But I cannot dump() an instance of clang::DeclarationName.

In SemaType.cpp, there is a global function, GetFullTypeForDeclarator().
In the global function, GetFullTypeForDeclarator(), there follows some
code below.

Let me show you the problem.