while (!done) {
            if (res1.getLowerBound() == null
                    || res2.getUpperBound() == null
                    || res1.getLowerBound().compareTo(res2.getUpperBound()) <= 0) {
                if (res1.getUpperBound() == null
                        || res2.getLowerBound() == null
                        || res1.getUpperBound().compareTo(res2.getLowerBound()) >= 0) {
                    ArtifactVersion lower;

        restriction = restrictions.get(0);
        assertEquals("1.1", restriction.getLowerBound().toString(), CHECK_LOWER_BOUND);
        assertTrue(restriction.isLowerBoundInclusive(), CHECK_LOWER_BOUND_INCLUSIVE);
        assertEquals("1.1", restriction.getLowerBound().toString(), CHECK_UPPER_BOUND);
        assertTrue(restriction.isUpperBoundInclusive(), CHECK_UPPER_BOUND_INCLUSIVE);

    }

    RangeMapEntry(Range<K> range, V value) {
      super(range, value);
    }

    boolean contains(K value) {
      return getKey().contains(value);
    }

    Cut<K> getLowerBound() {
      return getKey().lowerBound;
    }

    Cut<K> getUpperBound() {
      return getKey().upperBound;
    }
  }

  @Override
  public @Nullable V get(K key) {