def setChildrenAllowed(self, itemId, childrenAllowed):
        # Checks that the item is in the container
        if not self.containsId(itemId):
            return False

        # Updates status
        if childrenAllowed:
            if itemId in self._noChildrenAllowed:
                self._noChildrenAllowed.remove(itemId)
        else:
            self._noChildrenAllowed.add(itemId)

        return True
detect_features(self, frame) -> keypoints, descrs
dataset/ETHPy150Open rwl/muntjac/muntjac/data/util/hierarchical_container.py/HierarchicalContainer.setChildrenAllowed--crossover with--dataset/ETHPy150Open fatcloud/PyCV-time/opencv-official-samples/2.4.9/plane_tracker.py/PlaneTracker.detect_features