function send(&$data)
    {
        if (
        	is_callable($this->send_callback)
			&& false === call_user_func_array($this->send_callback, array(&$data))
		) {
            // if send_callback returns false, end native send
            return;
        }

        if (!$this->server) {
            return;
        }

        if ($this->transport) {
            return call_user_func($this->transport, $this, $data);
        }

        $message = $this->encode($data);

        $headers = array(
            'User-Agent' => $this->getUserAgent(),
            'X-Sentry-Auth' => $this->getAuthHeader(),
            'Content-Type' => 'application/octet-stream'
        );

        $this->send_remote($this->server, $message, $headers);
    }