Make more use of generated classes in analysis server.

pkg/analysis_server/lib/src/generated_protocol.dart

Index: pkg/analysis_server/lib/src/generated_protocol.dart
diff --git a/pkg/analysis_server/lib/src/generated_protocol.dart b/pkg/analysis_server/lib/src/generated_protocol.dart
index 226fb1c83f924b44d8a9b067972ed21de9ad0d7a..b40df5682f38eb5ffe80a4dd32ae3a129889aafc 100644
--- a/pkg/analysis_server/lib/src/generated_protocol.dart
+++ b/pkg/analysis_server/lib/src/generated_protocol.dart
@@ -756,7 +756,7 @@ class AnalysisSetSubscriptionsParams implements HasToJson {
 
   Map<String, dynamic> toJson() {
     Map<String, dynamic> result = {};
-    result["subscriptions"] = _mapMap(subscriptions, keyCallback: (AnalysisService value) => value.toJson());
+    result["subscriptions"] = mapMap(subscriptions, keyCallback: (AnalysisService value) => value.toJson());
     return result;
   }
 
@@ -823,7 +823,7 @@ class AnalysisUpdateContentParams implements HasToJson {
 
   Map<String, dynamic> toJson() {
     Map<String, dynamic> result = {};
-    result["files"] = _mapMap(files, valueCallback: (dynamic value) => value.toJson());
+    result["files"] = mapMap(files, valueCallback: (dynamic value) => value.toJson());
     return result;
   }