Implements support for reflection on parameters.

test_reflectable/test/capabilities_test.dart

Index: test_reflectable/test/capabilities_test.dart
diff --git a/test_reflectable/test/capabilities_test.dart b/test_reflectable/test/capabilities_test.dart
index f48d59b1882b93d56be51a2cd27e361a9730cf4e..6b89d78af9a476f84720210a6f38758418307dbe 100644
--- a/test_reflectable/test/capabilities_test.dart
+++ b/test_reflectable/test/capabilities_test.dart
@@ -17,7 +17,8 @@ class MyReflectableStatic extends r.Reflectable {
           const c.StaticInvokeCapability("getFoo"),
           const c.StaticInvokeCapability("setFoo="),
           const c.StaticInvokeCapability("nonExisting"),
-          const c.StaticInvokeMetaCapability(C));
+          const c.StaticInvokeMetaCapability(C),
+          c.declarationsCapability);
 }
 
 @MyReflectableStatic()
@@ -42,7 +43,8 @@ class MyReflectableInstance extends r.Reflectable {
           const c.InstanceInvokeCapability("getFoo"),
           const c.InstanceInvokeCapability("setFoo="),
           const c.InstanceInvokeCapability("nonExisting"),
-          const c.InstanceInvokeMetaCapability(C));
+          const c.InstanceInvokeMetaCapability(C),
+          c.declarationsCapability);
 }
 
 @MyReflectableInstance()