code: public static void enableSni(final String host, final SSLParameters sslParameters) {
          if (SNI_SSL_HELPER != null) {
              SNI_SSL_HELPER.enableSni(host, sslParameters);
          }
      }
docs: Enable SNI if running on Java 8 or later.  Otherwise fail silently to enable SNI.
  
  @param host          the server host
  @param sslParameters the SSL parameters