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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def send(self, url, **kwargs):
 """ Serializes and signs ``data`` and passes the payload off to ``send_remote`` If ``server`` was passed into the constructor, this will serialize the data and pipe it to the server using ``send_remote()``. """

        if self.config.server_url:
            return super(DjangoClient, self).send(url, **kwargs)
        else:
            self.error_logger.error("No server configured, and elasticapm not installed. Cannot send message")
            return None