public final ClusNode getTree(int fold) {
int idx = Arrays.binarySearch(m_Folds, fold);
ClusNode node = m_Nodes[idx];
if (node.hasBestTest() && node.atBottomLevel()) {
OptXValSplit split = null;
int nb = getNbChildren();
for (int i = 0; i < nb; i++) {
OptXValSplit msplit = (OptXValSplit) getChild(i);
if (msplit.contains(fold)) {
split = msplit;
break;
}
}
int arity = node.updateArity();
for (int i = 0; i < arity; i++) {
OptXValNode subnode = (OptXValNode) split.getChild(i);
node.setChild(subnode.getTree(fold), i);
}
}
return node;
}