for (int i = 0; i < children.size(); i++) {
WritingTransposedNode child = children.get(i);
Link link = links.get(i);
FreebaseProperty property = link.property;
Object c = child.internalWrite(null, null, project, subjectRowIndex, subjectCellIndex, null);
if (c != null) {
if (first) {
first = false;