Implements support for reflection on parameters.

test_reflectable/test/polymer_basic_needs_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Testing the basic set of features that are needed for polymer.
 
 library test_reflectable.test.polymer_basic_needs_test;
 
 import 'package:reflectable/reflectable.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 31 matching lines @@
           declaration.isGetter &&
           !_hasSetter(declaration.owner, declaration));
 
   bool isMethod() => !isField() && !isProperty();
 
   return new ThinDeclarationMirror(declaration.simpleName,
       declaration is VariableMirror, isProperty(), isFinal(), isMethod());
 }
 
 class MyReflectable extends Reflectable {
-  const MyReflectable() : super(instanceInvokeCapability);
+  const MyReflectable()
+      : super(instanceInvokeCapability, declarationsCapability);
 }
+
 const myReflectable = const MyReflectable();
 
 List<DeclarationMirror> _query(Type dartType) {
   ClassMirror mirror = myReflectable.reflectType(dartType);
   return mirror.declarations.values.toList();
 }
 
 List<ThinDeclarationMirror> buildMirrors(Type dartType) {
   return _query(dartType).map(makeThin).toList();
 }
@@ skipping 44 matching lines @@
     }
 
     // Check other methods from `polymer_basic_needs_lib`.
     A a = new A();
     write(a, "i", 7);
     expect(read(a, "i"), 7);
     invoke(a, "bar", [42]);
     expect(invoke(a, "foo", []), "OK!");
   });
 }