docs: @VisibleForTesting
    static OkHttpProtocolNegotiator createNegotiator(ClassLoader loader) {
      boolean android = true;
      try {
        // Attempt to find Android 2.3+ APIs.
        loader.loadClass("com.android.org.conscrypt.OpenSSLSocketImpl");
      } catch (ClassNotFoundException e1) {
        logger.log(Level.FINE, "Unable to find Conscrypt. Skipping", e1);
        try {
          // Older platform before being unbundled.
          loader.loadClass("org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl");
        } catch (ClassNotFoundException e2) {
          logger.log(Level.FINE, "Unable to find any OpenSSLSocketImpl. Skipping", e2);
          android = false;
        }
      }
      return android
          ? new AndroidNegotiator(DEFAULT_PLATFORM)
          : new OkHttpProtocolNegotiator(DEFAULT_PLATFORM);
    }