How to match TemplateTypeParm node in Clang AST with AST_Matchers?

I'm trying to get the RHS template type of a TypeAliasDecl.

Example:

using AliasOfType = AliasedType; // AliasedType itself is a template

I can retrieve AliasOfType in the AST using clang::ast_matchers::typeAliasDecl. I want to retrieve AliasedType with a clang::ast_matchers::.

The AST dump of clang::ast_matchers::typeAliasDecl looks like:

TypeAliasDecl 0x4fe22cf8 AliasOfType
  -SubstTemplateTypeParmType  0x4fe22cc0
   |-TemplateTypeParmType 0x4fe1a840 `AliasedType` dependent depth 0 index 0
   | `-TemplateTypeParm 0x4fe1a7f8 'AliasedType'

So intuitively, I'd want to match for TemplateTypeParm which has my previous match as an ancestor. However, I haven't found an ast_matcher that does that. There's clang::ast_matchers::templateTypeParmType, but it gives errors if I try to put anything as a narrowing parameter like:

templateTypeParmType(hasName("AliasedType"))

The error I get when I try that is:

clang/ASTMatchers/ASTMatchersInternal.h:1347:13: error: ‘clang::ast_matchers::internal::Matcher< <template-parameter-1-1> >::Matcher(const clang::ast_matchers::internal::DynTypedMatcher&) [with T = clang::TemplateTypeParmType]’ is private within this context
 return {Matcher<T>(std::get<Is>(Params))...};