return false;
    }
    try {
      // If the current environment is null, we're not inside AppEngine.
      return Class.forName("com.google.apphosting.api.ApiProxy")
              .getMethod("getCurrentEnvironment")
              .invoke(null)
          != null;
    } catch (ClassNotFoundException e) {
      // If ApiProxy doesn't exist, we're not on AppEngine at all.
      return false;