adding packages

deprecated/mobile_sidebar/example/macos/ExampleWindow.swift

@@ -0,0 +1,35 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Cocoa
+
+class ExampleWindow: NSWindow {
+  @IBOutlet weak var flutterViewController: FLEViewController!
+
+  override func awakeFromNib() {
+    PluginRegistrant.register(with: flutterViewController)
+
+    let assets = NSURL.fileURL(withPath: "flutter_assets", relativeTo: Bundle.main.resourceURL)
+    var arguments: [String] = [];
+#if !DEBUG
+    arguments.append("--disable-dart-asserts");
+#endif
+    flutterViewController.launchEngine(
+      withAssetsPath: assets,
+      commandLineArguments: arguments)
+
+    super.awakeFromNib()
+  }
+}
+