diff --git a/clang-tools-extra/clangd/SourceCode.h b/clang-tools-extra/clangd/SourceCode.h
index 55289e0..4559376 100644
--- a/clang-tools-extra/clangd/SourceCode.h
+++ b/clang-tools-extra/clangd/SourceCode.h
@@ -156,6 +156,10 @@
 cleanupAndFormat(StringRef Code, const tooling::Replacements &Replaces,
                  const format::FormatStyle &Style);
 
+/// Collects identifiers with counts in the source code.
+llvm::StringMap<unsigned> collectIdentifiers(llvm::StringRef Content,
+                                             const format::FormatStyle &Style);
+
 } // namespace clangd
 } // namespace clang
 #endif