public boolean isEmpty() {
<BUG>return insertionTable.isEmpty();
</BUG>
}
@Override
<BUG>public ReadOnlyIterator<E> iterator() {
return ReadOnlyIterator.of(insertionTable.iterator());
}</BUG>
@Override
public boolean removeIf(Predicate<? super E> filter) {

public boolean isEmpty() {
return inner.isEmpty();
}
@Override
public Iterator<E> iterator() {
return insertionTable.unmodifiable().iterator();
}
@Override
public boolean removeIf(Predicate<? super E> filter) {
