void (@Nullable IntervalNode<T> node) { if (node != null) { long packedOffsets = node.cachedDeltaUpToRoot; if (IntervalNode.allDeltasUpAreNull(packedOffsets) && node.isValid() && IntervalNode.modCount(packedOffsets) == getModCount()) return; pushDeltaFromRoot(node.getParent()); pushDelta(node); } }