@Override public L join(L left, L right) throws Exception { String rightLabel = right == null ? "" : right.getLabel(); left.setLabel(left.getLabel() + rightLabel); return left; } }
@Override public L join(L left, L right) throws Exception { String rightLabel = right == null ? "" : right.getLabel(); left.setLabel(left.getLabel() + rightLabel); return left; } }