public int hashCode() {
            return delegate.hashCode();
        }

        @Override
        public String asString() {
            return delegate.toString();
        }

        @Override
        public String toString() {
            return asString();
        }
    }

    static class DefaultVersionRange implements VersionRange {
        private final VersionScheme versionScheme;

    @Override
    public void setProperty(Project project, String key, String value) {
        Properties properties = getMavenProject(project).getProperties();
        if (value == null) {
            properties.remove(key);
        } else {
            properties.setProperty(key, value);
        }
    }

    @Override
    public Map<String, String> getProperties(Project project) {

 * @see org.apache.maven.api.Session#parseVersion(String)
 * @see VersionConstraint
 * @see VersionRange
 */
@Experimental
public interface Version extends Comparable<Version> {
    /**
     * Returns a string representation of this version.
     * @return the string representation of this version
     */
    @Nonnull
    String asString();

     */
    @Nullable
    Boundary getLowerBoundary();

    /**
     * Returns a string representation of this version range
     * @return the string representation of this version range
     */
    @Nonnull
    String asString();

    /**
     * Represents range boundary.
     */
    interface Boundary {
        /**
         * The bounding version.
         */

    }

    @Nonnull
    default ArtifactCoordinates create(
            @Nonnull Session session,
            String groupId,
            String artifactId,
            String version,
            String classifier,
            String extension,
            String type) {
        return create(ArtifactCoordinatesFactoryRequest.build(

        private Session session;
        private String groupId;
        private String artifactId;
        private String version;
        private String classifier;
        private String extension;
        private String type;
        private String coordinateString;
        private String scope;
        private boolean optional;

     */
    boolean contains(@Nonnull Version version);

    /**
     * Returns a string representation of this version constraint
     * @return the string representation of this version constraint
     */
    @Nonnull
    String asString();

        return new ModelVersionParser() {
            @Override
            public Version parseVersion(String version) {
                requireNonNull(version, "version");
                return new Version() {
                    @Override
                    public String asString() {
                        return version;
                    }

                    @Override

    @Nonnull
    Session getSession();

    String getGroupId();

    String getArtifactId();

    String getVersion();

    String getClassifier();

    String getExtension();

    String getType();

    String getCoordinatesString();

    @Nonnull
    static ArtifactCoordinatesFactoryRequest build(
            @Nonnull Session session, String groupId, String artifactId, String version, String extension) {

	case int64:
		return v, nil
	case int:
		return int64(v), nil
	case string:
		i, err := strconv.Atoi(v)
		return int64(i), err
	default:
		return 0, errors.New("Invalid number format")
	}
}

// isString - Safely check if val is of type string without causing panic.
func isString(val interface{}) bool {
	_, ok := val.(string)
	return ok
}

// ContentLengthRange - policy content-length-range field.