Creates `reflectors`, as a meta-meta feature that enables dynamic selection of a "mirror system".

test_reflectable/test/meta_reflectors_definer.dart

+// Copyright (c) 2015, the Dart Team. All rights reserved. Use of this
+// source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+// File being transformed by the reflectable transformer.
+// Part of the entry point 'reflectors_test.dart'.
+//
+// Independence: This library defines reflectors only, and it does not depend
+// on domain classes (`M1..3, A..D, P`) nor on the usage of reflection, i.e.,
+// these reflectors could have been defined in a third-party package .
+
+library test_reflectable.test.meta_reflectors_definer;
+
+import "package:reflectable/reflectable.dart";
+
+class Reflector extends Reflectable {
+  const Reflector()
+      : super(invokingCapability, declarationsCapability, libraryCapability);
+}
+
+class Reflector2 extends Reflectable {
+  const Reflector2()
+      : super(invokingCapability, metadataCapability, libraryCapability);
+}
+
+class ReflectorUpwardsClosed extends Reflectable {
+  const ReflectorUpwardsClosed()
+      : super(superclassQuantifyCapability, invokingCapability,
+            declarationsCapability, typeRelationsCapability);
+}