Fine-grain field, getter, setter, and function access in IrBuilder.

pkg/analyzer2dart/lib/src/modely.dart

Index: pkg/analyzer2dart/lib/src/modely.dart
diff --git a/pkg/analyzer2dart/lib/src/modely.dart b/pkg/analyzer2dart/lib/src/modely.dart
index e69d5f058066f889aa14880a85acf00f299f48dd..d358f65b027b198f8e3469a43e5a5ac7b8619f45 100644
--- a/pkg/analyzer2dart/lib/src/modely.dart
+++ b/pkg/analyzer2dart/lib/src/modely.dart
@@ -381,8 +381,9 @@ class TopLevelFunctionElementY extends ElementY
     with AnalyzableElementY,
          AstElementY,
          TopLevelElementMixin,
-         FunctionElementMixin
-    implements dart2js.FunctionElement {
+         FunctionElementMixin,
+         MemberElementMixin
+    implements dart2js.MethodElement {
   analyzer.FunctionElement get element => super.element;
 
   @override
@@ -391,6 +392,9 @@ class TopLevelFunctionElementY extends ElementY
   TopLevelFunctionElementY(ElementConverter converter,
                            analyzer.FunctionElement element)
       : super(converter, element);
+
+  @override
+  get nestedClosures => unsupported('nestedClosures');
 }
 
 class LocalFunctionElementY extends ElementY