how do I prune a visitation of a subtree in Clang when using RecursiveASTVisitor?

Question

In Clang I am using RecursiveASTVisitor to visit the AST nodes of a C++ translation unit. This is basically working, but now I want to visit AST nodes that are instantiated from function and class templates.

I understand that if I want to visit the template instantiations I should have my visitor define shouldVisitTemplateInstantiations() to return true; this seems to be working. However visiting the template patterns themselves is a huge distraction, as I just want the instantiated code.

How do I not visit the template patterns, or if I must, how do I prune the traversal of the subtree when I end up in one (such as when I end up in a FunctionTemplateDecl)?

The comment at RecursiveASTVisitor says:

/// Most users only need to override Visit*.  Advanced
/// users may override Traverse* and WalkUpFrom* to implement custom
/// traversal strategies.  Returning false from one of these overridden
/// functions will abort the entire traversal.

I am intercepting the visitation at VisitDecl(). It seems that returning false from VisitDecl() is not the thing to do, as I do not want to "abort the entire traversal", just the traversal of the subtree that I am on, namely the template (pattern) body. Trying that now, it really does seem to abort the whole traversal.