def _step_up(self) -> bool:
        """Step back to the previous search space on stack to evaluate based on the next best sample."""
        if not self._path:
            return False

        self._path.pop()

        # Results here are already sorted, don't have to do it again!
        return self._initialize_step()
Step back to the previous search space on stack to evaluate based on the next best sample.
olive/search/search_strategy.py