[clang-tools-extra] [clang-tidy] Refactor how NamedDecl are renamed (PR #88735)

[Piotr Zegar via cfe-commits]

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@@ -61,6 +61,44 @@ struct DenseMapInfo<clang::tidy::RenamerClangTidyCheck::NamingCheckId> {
 namespace clang::tidy {
 
 namespace {
+/// Returns the function that \p Method is overridding. If There are none or
+/// multiple overrides it returns nullptr. If the overridden function itself is
+/// overridding then it will recurse up to find the first decl of the function.
+const CXXMethodDecl *getOverrideMethod(const CXXMethodDecl *Method) {
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PiotrZSL wrote:

anyonymous namespace -> static (per llvm codding guidelines)
leave only NameLookup in anonymous namespace

https://github.com/llvm/llvm-project/pull/88735