children = newChildren;
if (node.getTotalDurationNanos() == 0) {
parentTotalDurationPercent = null;
} else {
parentTotalDurationNanos = node.getTotalDurationNanos() - childrenTotalDurationNanos;
parentTotalDurationPercent = new Percent(parentTotalDurationNanos * 100.0 / node.getTotalDurationNanos());
}
fireTableDataChanged();
}