<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _raw_request(self, method_name, region, url, query_params):
 """ Sends a request through the BaseApi instance provided, injecting the provided endpoint_name into the method call, so the caller doesn't have to. :param string method_name: The name of the calling method :param string region: The region to execute this request on :param string url: The full URL to the method being requested. :param dict query_params: Query parameters to be provided in the HTTP request """

        return self._base_api.raw_request(
            self._endpoint_name, method_name, region, url, query_params
        )