try {
            versionRange = VersionRange.createFromVersionSpec(version);
        } catch (InvalidVersionSpecificationException e) {
            return null;
        }

        return createExtensionArtifactX(groupId, artifactId, versionRange);
    }

    // DefaultProjectBuilder
    public Artifact createParentArtifact(String groupId, String artifactId, String version) {