code: @GwtIncompatible // java.lang.reflect
    @NullableDecl
    private static Object getJLA() {
      try {
        /*
         * We load sun.misc.* classes using reflection since Android doesn't support these classes and
         * would result in compilation failure if we directly refer to these classes.
         */
        Class<?> sharedSecrets = Class.forName(SHARED_SECRETS_CLASSNAME, false, null);
        Method langAccess = sharedSecrets.getMethod("getJavaLangAccess");
        return langAccess.invoke(null);
      } catch (ThreadDeath death) {
        throw death;
      } catch (Throwable t) {
        /*
         * This is not one of AppEngine's allowed classes, so even in Sun JDKs, this can fail with
         * a NoClassDefFoundError. Other apps might deny access to sun.misc packages.
         */
        return null;
      }
    }
docs: Returns the JavaLangAccess class that is present in all Sun JDKs. It is not allowed in
  AppEngine, and not present in non-Sun JDKs.