code: protected void writeRequest(final NextFilter nextFilter,
              final HttpProxyRequest request) throws ProxyAuthException {
          logger.debug("  sending HTTP request");
  
          ((AbstractHttpLogicHandler) proxyIoSession.getHandler()).writeRequest(
                  nextFilter, request);
      }
docs: Sends an HTTP request.
  
  @param nextFilter the next filter
  @param request the request to write
  @throws ProxyAuthException