@Override
public final int hashCode() {
int h = 0;
for (I item : this) {
if (item == null) continue;
h += item.hashCode();
}
return h;
}
public int hashCode() {
int result;
result = (instance != null ? instance.hashCode() : 0);
result = 29 * result + (label != null ? label.hashCode() : 0);
return result;
}
