Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/analyzer/src/generated/utilities_dart.dart

+// Copyright (c) 2014, 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.
+
+// This code was auto-generated, is not intended to be edited, and is subject to
+// significant change. Please see the README file for more information.
+
+library engine.utilities.dart;
+
+import 'java_core.dart';
+
+/**
+ * The enumeration `ParameterKind` defines the different kinds of parameters. There are two
+ * basic kinds of parameters: required and optional. Optional parameters are further divided into
+ * two kinds: positional optional and named optional.
+ */
+class ParameterKind extends Enum<ParameterKind> {
+  static const ParameterKind REQUIRED = const ParameterKind('REQUIRED', 0, false);
+
+  static const ParameterKind POSITIONAL = const ParameterKind('POSITIONAL', 1, true);
+
+  static const ParameterKind NAMED = const ParameterKind('NAMED', 2, true);
+
+  static const List<ParameterKind> values = const [REQUIRED, POSITIONAL, NAMED];
+
+  /**
+   * A flag indicating whether this is an optional parameter.
+   */
+  final bool isOptional;
+
+  /**
+   * Initialize a newly created kind with the given state.
+   *
+   * @param isOptional `true` if this is an optional parameter
+   */
+  const ParameterKind(String name, int ordinal, this.isOptional) : super(name, ordinal);
+}