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

test_reflectable/test/meta_reflectors_domain_definer.dart

Index: test_reflectable/test/meta_reflectors_domain_definer.dart
diff --git a/test_reflectable/test/meta_reflectors_domain_definer.dart b/test_reflectable/test/meta_reflectors_domain_definer.dart
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index 0000000000000000000000000000000000000000..a13aaf901c4138dbbd0ad4131711a5e7f1dafbbd
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+// 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 the usage of reflection. It does depend on the domain classes, because
+/// it uses `A` as an upper bound in a superclass quantifier.
+library test_reflectable.test.meta_reflectors_domain_definer;
+
+import "package:reflectable/reflectable.dart";
+import "meta_reflectors_domain.dart";
+
+class ReflectorUpwardsClosedToA extends Reflectable {
+  const ReflectorUpwardsClosedToA()
+      : super(const SuperclassQuantifyCapability(A), invokingCapability,
+                  declarationsCapability);
+}
+
+class ReflectorUpwardsClosedUntilA extends Reflectable {
+  const ReflectorUpwardsClosedUntilA()
+      : super(const SuperclassQuantifyCapability(A, excludeUpperBound: true),
+                  invokingCapability, declarationsCapability);
+}