}

    @Override
    protected Set<E> delegate() {
      return infiniteCandidates.next();
    }
  }

  private static final class MutatedOnQueryList<E> extends ForwardingList<E> {
    final Iterator<ImmutableList<E>> infiniteCandidates;

    MutatedOnQueryList(Iterable<ImmutableList<E>> infiniteCandidates) {
      this.infiniteCandidates = infiniteCandidates.iterator();
    }

    @Override