private void writeChildGroups(Writer out) throws IOException {
boolean writeTr = parent == null;
if (children != null) {
for (Iterator itr = sortedGroups(); itr.hasNext(); ) {
GroupCell gc = (GroupCell) children.get(itr.next());
gc.toHTML(out, writeTr);
writeTr = true;
}
} else {
writeRows(out);
}
}
