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runtime/bin/platform_patch.dart

 // Copyright (c) 2012, 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.
 
-@patch class _Platform {
-  @patch static int _numberOfProcessors()
-      native "Platform_NumberOfProcessors";
-  @patch static String _pathSeparator()
-      native "Platform_PathSeparator";
-  @patch static String _operatingSystem()
-      native "Platform_OperatingSystem";
-  @patch static _localHostname()
-      native "Platform_LocalHostname";
-  @patch static _executable()
-      native "Platform_ExecutableName";
-  @patch static _resolvedExecutable()
-      native "Platform_ResolvedExecutableName";
-  @patch static _environment()
-      native "Platform_Environment";
-  @patch static List<String> _executableArguments()
+@patch
+class _Platform {
+  @patch
+  static int _numberOfProcessors() native "Platform_NumberOfProcessors";
+  @patch
+  static String _pathSeparator() native "Platform_PathSeparator";
+  @patch
+  static String _operatingSystem() native "Platform_OperatingSystem";
+  @patch
+  static _localHostname() native "Platform_LocalHostname";
+  @patch
+  static _executable() native "Platform_ExecutableName";
+  @patch
+  static _resolvedExecutable() native "Platform_ResolvedExecutableName";
+  @patch
+  static _environment() native "Platform_Environment";
+  @patch
+  static List<String> _executableArguments()
       native "Platform_ExecutableArguments";
-  @patch static String _version()
-      native "Platform_GetVersion";
+  @patch
+  static String _version() native "Platform_GetVersion";
 
-  @patch static String _packageRoot()
-      => VMLibraryHooks.packageRootString;
-  @patch static String _packageConfig()
-      => VMLibraryHooks.packageConfigString;
+  @patch
+  static String _packageRoot() => VMLibraryHooks.packageRootString;
+  @patch
+  static String _packageConfig() => VMLibraryHooks.packageConfigString;
 
   // This script singleton is written to by the embedder if applicable.
   static void set _nativeScript(String path) {
     if (path.startsWith('http:') ||
         path.startsWith('https:') ||
         path.startsWith('package:') ||
         path.startsWith('dart:') ||
         path.startsWith('data:') ||
         path.startsWith('file:')) {
       script = Uri.parse(path);
     } else {
       script = Uri.base.resolveUri(new Uri.file(path));
     }
     VMLibraryHooks.platformScript = script;
   }
 }