<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def run_model(self, model_run, run_url):
 """Create entry in run request buffer. Parameters model_run : ModelRunHandle Handle to model run run_url : string URL for model run information """

        # Create model run request
        request = RequestFactory().get_request(model_run, run_url)
        # Write request and connector information into buffer
        self.collection.insert_one({
            'connector' : self.connector,
            'request' : request.to_dict()
        })