'Initialise a Tornado AsyncClient and send the reuqest to the sentry
server. If the callback is a callable, it will be called with the
response.'

def _send_remote(self, url, data, headers=None, callback=None):

    if (headers is None):
        headers = {}
    return AsyncHTTPClient().fetch(url, callback, method='POST', body=data, headers=headers, validate_cert=self.validate_cert)
