Hooks for injecting embedder resolver providers.

pkg/analyzer/lib/plugin/embedded_resolver_provider.dart

+// Copyright (c) 2016, 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.
+
+library analyzer.plugin.embedded_resolver_provider;
+
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/source/embedder.dart';
+
+/**
+ * A function that will return a [UriResolver] that can be used to resolve
+ * URI's for embedded libraries within a given folder, or `null` if we should
+ * fall back to the standard URI resolver.
+ */
+typedef EmbedderUriResolver EmbeddedResolverProvider(Folder folder);