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;

    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();

        buf.append(isLowerBoundInclusive() ? '[' : '(');
        if (getLowerBound() != null) {
            buf.append(getLowerBound().toString());
        }
        buf.append(',');
        if (getUpperBound() != null) {
            buf.append(getUpperBound().toString());
        }

    }

    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) {

        }

        VersionRange range = artifact.getVersionRange();
        if (range != null) {
            for (Restriction restriction : range.getRestrictions()) {
                if (isSnapshot(restriction.getLowerBound()) || isSnapshot(restriction.getUpperBound())) {
                    return RELEASE_OR_SNAPSHOT;
                }
            }
        }

        return RELEASE;
    }