this.artifactId = artifactId;
            return this;
        }

        public DependencyCoordinatesFactoryRequestBuilder version(String version) {
            this.version = version;
            return this;
        }

        public DependencyCoordinatesFactoryRequestBuilder classifier(String classifier) {
            this.classifier = classifier;

        return Objects.equals(a1.getGroupId(), a2.getGroupId())
                && Objects.equals(a1.getArtifactId(), a2.getArtifactId())
                && Objects.equals(a1.getVersion(), a2.getVersion());
    }

    private Properties toProperties(Map<String, String> dominant, Map<String, String> recessive) {
        Properties props = new Properties();
        if (recessive != null) {

        return artifact.getGroupId();
    }

    @Override
    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    @Override
    public String getVersion() {
        return "";
    }

    @Override
    public Nature getNature() {
        return artifact.isSnapshot() ? Nature.RELEASE_OR_SNAPSHOT : Nature.RELEASE;
    }

        } else {
            changed = metadata.merge(this.metadata);
        }

        // beware meta-versions!
        String version = metadata.getVersion();
        if (Artifact.LATEST_VERSION.equals(version) || Artifact.RELEASE_VERSION.equals(version)) {
            // meta-versions are not valid <version/> values...don't write them.
            metadata.setVersion(null);
        }

        if (changed || !metadataFile.exists()) {

                }
            }
        }

        return RELEASE;
    }

    private boolean isSnapshot(ArtifactVersion version) {
        return version != null && ArtifactUtils.isSnapshot(version.getQualifier());
    }

    public ArtifactRepository getRepository() {
        return null;
    }

    public void setRepository(ArtifactRepository remoteRepository) {
        /*

    void testDefaultPolicy() throws Exception {
        MetadataGraphEdge res;

        res = policy.apply(e1, e2);
        assertEquals("1.1", res.getVersion(), "Wrong depth edge selected");

        res = policy.apply(e1, e3);
        assertEquals("1.2", res.getVersion(), "Wrong version edge selected");
    }
    // ------------------------------------------------------------------------------------------

        return create(ArtifactCoordinatesFactoryRequest.build(session, groupId, artifactId, version, extension));
    }

    @Nonnull
    default ArtifactCoordinates create(
            @Nonnull Session session,
            String groupId,
            String artifactId,
            String version,
            String classifier,

        return emptify(metadata.getGroupId());
    }

    public String getArtifactId() {
        return metadata.storedInGroupDirectory() ? "" : emptify(metadata.getArtifactId());
    }

    public String getVersion() {
        return metadata.storedInArtifactVersionDirectory() ? emptify(metadata.getBaseVersion()) : "";
    }

    public String getType() {
        return metadata.getRemoteFilename();
    }

        return (artifactId != null) ? artifactId : "";
    }

    /**
     * Gets the effective version of the model.
     *
     * @return The effective version of the model or an empty string if unknown, never {@code null}.
     */
    public String getVersion() {
        return (version != null) ? version : "";
    }

    /**
     * Gets unique identifier of the model
     *

                        consumer.getVersion(),
                        consumer.getProperties(),
                        consumer.getFile()));
            }
            artifacts = result;
        }
        return artifacts;
    }

    void write(Model model, Path dest) throws IOException, XMLStreamException {
        String version = model.getModelVersion();