Make more use of generated classes in analysis server.

pkg/analysis_server/lib/src/protocol2.dart

Index: pkg/analysis_server/lib/src/protocol2.dart
diff --git a/pkg/analysis_server/lib/src/protocol2.dart b/pkg/analysis_server/lib/src/protocol2.dart
index 1601f05675c123984c0864a49f28b7361628d924..b0894763ef294a7fd74bd6649541794b94c1268e 100644
--- a/pkg/analysis_server/lib/src/protocol2.dart
+++ b/pkg/analysis_server/lib/src/protocol2.dart
@@ -51,7 +51,7 @@ bool _mapEqual(Map mapA, Map mapB, bool valueEqual(a, b)) {
  * Translate the input [map], applying [keyCallback] to all its keys, and
  * [valueCallback] to all its values.
  */
-_mapMap(Map map, {dynamic keyCallback(key), dynamic valueCallback(value)}) {
+mapMap(Map map, {dynamic keyCallback(key), dynamic valueCallback(value)}) {
   Map result = {};
   map.forEach((key, value) {
     if (keyCallback != null) {