diff --git a/src/config.h b/src/config.h
index c16939a43..b6e7589db 100644
--- a/src/config.h
+++ b/src/config.h
@@ -157,6 +157,12 @@ struct Config {
   };
   Completion completion;
 
+  struct Extension {
+    // If true, reference results will include "containerName".
+    bool referenceContainer = false;
+  };
+  Extension extension;
+
   struct Index {
     // 0: none, 1: doxygen, 2: all comments
     // Plugin support for clients:
@@ -182,6 +188,7 @@ struct Config {
 };
 MAKE_REFLECT_STRUCT(Config::ClientCapability, snippetSupport);
 MAKE_REFLECT_STRUCT(Config::Completion, filterAndSort, detailedLabel);
+MAKE_REFLECT_STRUCT(Config::Extension, referenceContainer);
 MAKE_REFLECT_STRUCT(Config::Index, comments, attributeMakeCallsToCtor);
 MAKE_REFLECT_STRUCT(Config,
                     compilationDatabaseDirectory,
@@ -218,6 +225,7 @@ MAKE_REFLECT_STRUCT(Config,
 
                     client,
                     completion,
+                    extension,
                     index,
 
                     dumpAST);
diff --git a/src/indexer.cc b/src/indexer.cc
index 0efd329b6..b72559c63 100644
--- a/src/indexer.cc
+++ b/src/indexer.cc
@@ -835,23 +835,6 @@ struct FindChildOfKindParam {
   FindChildOfKindParam(CXCursorKind target_kind) : target_kind(target_kind) {}
 };
 
-ClangCursor::VisitResult FindChildOfKindVisitor(ClangCursor cursor,
-                                                ClangCursor parent,
-                                                FindChildOfKindParam* param) {
-  if (cursor.get_kind() == param->target_kind) {
-    param->result = cursor;
-    return ClangCursor::VisitResult::Break;
-  }
-
-  return ClangCursor::VisitResult::Recurse;
-}
-
-optional<ClangCursor> FindChildOfKind(ClangCursor cursor, CXCursorKind kind) {
-  FindChildOfKindParam param(kind);
-  cursor.VisitChildren(&FindChildOfKindVisitor, &param);
-  return param.result;
-}
-
 ClangCursor::VisitResult FindTypeVisitor(ClangCursor cursor,
                                          ClangCursor parent,
                                          optional<ClangCursor>* result) {
@@ -873,19 +856,6 @@ optional<ClangCursor> FindType(ClangCursor cursor) {
   return result;
 }
 
-bool IsGlobalContainer(const CXIdxContainerInfo* container) {
-  if (!container)
-    return false;
-
-  switch (container->cursor.kind) {
-    case CXCursor_Namespace:
-    case CXCursor_TranslationUnit:
-      return true;
-    default:
-      return false;
-  }
-}
-
 bool IsTypeDefinition(const CXIdxContainerInfo* container) {
   if (!container)
     return false;
diff --git a/src/language_server_api.h b/src/language_server_api.h
index 9761ee2c2..4b635268b 100644
--- a/src/language_server_api.h
+++ b/src/language_server_api.h
@@ -178,6 +178,12 @@ struct lsLocation {
 MAKE_HASHABLE(lsLocation, t.uri, t.range);
 MAKE_REFLECT_STRUCT(lsLocation, uri, range);
 
+// cquery extension
+struct lsLocationEx : lsLocation {
+  optional<std::string> containerName;
+};
+MAKE_REFLECT_STRUCT(lsLocationEx, uri, range, containerName);
+
 enum class lsSymbolKind : int {
   File = 1,
   Module = 2,
diff --git a/src/messages/text_document_references.cc b/src/messages/text_document_references.cc
index 31e9bcec3..f39751a6b 100644
--- a/src/messages/text_document_references.cc
+++ b/src/messages/text_document_references.cc
@@ -32,7 +32,7 @@ REGISTER_IPC_MESSAGE(Ipc_TextDocumentReferences);
 struct Out_TextDocumentReferences
     : public lsOutMessage<Out_TextDocumentReferences> {
   lsRequestId id;
-  std::vector<lsLocation> result;
+  std::vector<lsLocationEx> result;
 };
 MAKE_REFLECT_STRUCT(Out_TextDocumentReferences, jsonrpc, id, result);
 
@@ -58,10 +58,11 @@ struct TextDocumentReferencesHandler
           db, sym, request->params.context.includeDeclaration);
       out.result.reserve(uses.size());
       for (Use use : uses) {
-        optional<lsLocation> ls_location =
-            GetLsLocation(db, working_files, use);
-        if (ls_location)
-          out.result.push_back(*ls_location);
+        optional<lsLocationEx> ls_loc = GetLsLocationEx(
+            db, working_files, use, config->extension.referenceContainer);
+        if (ls_loc) {
+          out.result.push_back(*ls_loc);
+        }
       }
       break;
     }
@@ -75,7 +76,7 @@ struct TextDocumentReferencesHandler
               for (const IndexInclude& include1 : file1.def->includes)
                 if (include1.resolved_path == include.resolved_path) {
                   // Another file |file1| has the same include line.
-                  lsLocation result;
+                  lsLocationEx result;
                   result.uri = lsDocumentUri::FromPath(file1.def->path);
                   result.range.start.line = result.range.end.line =
                       include1.line;
diff --git a/src/query_utils.cc b/src/query_utils.cc
index a1853daea..98cea0ffd 100644
--- a/src/query_utils.cc
+++ b/src/query_utils.cc
@@ -390,6 +390,41 @@ optional<lsLocation> GetLsLocation(QueryDatabase* db,
   return lsLocation(uri, *range);
 }
 
+optional<lsLocationEx> GetLsLocationEx(QueryDatabase* db,
+                                       WorkingFiles* working_files,
+                                       Use use,
+                                       bool extension) {
+  optional<lsLocation> ls_loc = GetLsLocation(db, working_files, use);
+  if (!ls_loc)
+    return nullopt;
+  lsLocationEx ret;
+  ret.lsLocation::operator=(*ls_loc);
+  if (extension)
+    switch (use.kind) {
+    default:
+      break;
+    case SymbolKind::Func: {
+      QueryFunc& func = db->GetFunc(use);
+      if (func.def)
+        ret.containerName = func.def->detailed_name;
+      break;
+    }
+    case SymbolKind::Type: {
+      QueryType& type = db->GetType(use);
+      if (type.def)
+        ret.containerName = type.def->detailed_name;
+      break;
+    }
+    case SymbolKind::Var: {
+      QueryVar& var = db->GetVar(use);
+      if (var.def)
+        ret.containerName = var.def->detailed_name;
+      break;
+    }
+    }
+  return ret;
+}
+
 std::vector<lsLocation> GetLsLocations(
     QueryDatabase* db,
     WorkingFiles* working_files,
diff --git a/src/query_utils.h b/src/query_utils.h
index 213607b17..de2c03da3 100644
--- a/src/query_utils.h
+++ b/src/query_utils.h
@@ -45,10 +45,13 @@ lsDocumentUri GetLsDocumentUri(QueryDatabase* db, QueryFileId file_id);
 optional<lsLocation> GetLsLocation(QueryDatabase* db,
                                    WorkingFiles* working_files,
                                    Reference location);
-std::vector<lsLocation> GetLsLocations(
-    QueryDatabase* db,
-    WorkingFiles* working_files,
-    const std::vector<Use>& refs);
+optional<lsLocationEx> GetLsLocationEx(QueryDatabase* db,
+                                       WorkingFiles* working_files,
+                                       Use use,
+                                       bool extension);
+std::vector<lsLocation> GetLsLocations(QueryDatabase* db,
+                                       WorkingFiles* working_files,
+                                       const std::vector<Use>& refs);
 // Returns a symbol. The symbol will have *NOT* have a location assigned.
 optional<lsSymbolInformation> GetSymbolInfo(QueryDatabase* db,
                                             WorkingFiles* working_files,