Some fixes to work better with the services framework

pkg/serialization/lib/src/basic_rule.dart

Index: pkg/serialization/lib/src/basic_rule.dart
diff --git a/pkg/serialization/lib/src/basic_rule.dart b/pkg/serialization/lib/src/basic_rule.dart
index d8f1ebeb74bbaa3b13ee9ead9a9a6037e0da00f2..303a9e1a04a23f0b2c2a3d0da3f6ebbf2b7746a4 100644
--- a/pkg/serialization/lib/src/basic_rule.dart
+++ b/pkg/serialization/lib/src/basic_rule.dart
@@ -161,7 +161,7 @@ class BasicRule extends SerializationRule {
    * Extract the state from [object] using an instanceMirror and the field
    * names in [fields]. Call the function [callback] on each value.
    */
-  extractState(object, Function callback) {
+  extractState(object, Function callback, Writer w) {
     var result = createStateHolder();
     var mirror = reflect(object);