How to use the carto.analysis.Execution function in carto

def _fetch_executions(self):
        if self._executions_pending:
            self._executions_pending = False
            execs = self._context.api.schedule_executions(
                self.job_id, self.schedule_id
            )
            # TODO: is this necessary?
            # (does Nomad API guarantee the result order? )
            execs.sort(key=lambda e: e['time'])
            self._executions = [
                Execution(
                    self._context, self.job_id, self.schedule_id, exec
                )
                for exec in execs
            ]