public void setDependencyTrail(List<String> dependencyTrail) {
        artifact.setDependencyTrail(dependencyTrail);
    }

    /** {@inheritDoc} */
    @Override
    public void setScope(String scope) {
        artifact.setScope(scope);
    }

    /** {@inheritDoc} */
    @Override
    public VersionRange getVersionRange() {
        return artifact.getVersionRange();
    }

    /** {@inheritDoc} */

        //
        Dependency d = new Dependency();
        d.setGroupId("org.apache.maven.its");
        d.setArtifactId("b");
        d.setVersion("0.1");
        d.setScope(Artifact.SCOPE_COMPILE);
        Artifact artifact = repositorySystem.createDependencyArtifact(d);

        ArtifactResolutionRequest request = new ArtifactResolutionRequest()
                .setArtifact(artifact)

        // scoped graph is versioned by definition
        if (scopedVertices) {
            versionedVertices = true;
        }
    }

    public ArtifactScopeEnum getScope() {
        return scope;
    }

    public void setScope(ArtifactScopeEnum scope) {
        this.scope = scope;
    }

    // ------------------------------------------------------------------------
    public boolean isEmpty() {

        }

        if ((artifact.getScope() != null)
                && (!node.isChildOfRootNode() || node.getArtifact().getScope() == null)) {
            fireEvent(ResolutionListener.MANAGE_ARTIFACT_SCOPE, listeners, node, artifact);
            node.getArtifact().setScope(artifact.getScope());
        }

        if (Artifact.SCOPE_SYSTEM.equals(node.getArtifact().getScope())

                        RepositoryUtils.toDependency(dependency, session.getArtifactTypeRegistry());
                if (!DependencyScope.SYSTEM.is(pluginDep.getScope())) {
                    pluginDep = pluginDep.setScope(DependencyScope.RUNTIME.id());
                }
                request.addDependency(pluginDep);
            }

    }

    @Override
    public void setDependencyTrail(List<String> dependencyTrail) {
        this.dependencyTrail = dependencyTrail;
    }

    @Override
    public void setScope(String scope) {
        this.scope = scope;
    }

    @Override
    public VersionRange getVersionRange() {
        return versionRange;
    }

    @Override

     * Gets the cache scope (ALL or IMMEDIATE_CHILDREN)
     * @return the cache scope
     */
    public DirectoryCacheScope getScope() {
        return scope;
    }

    /**
     * Sets the cache scope for this directory cache
     * @param scope the cache scope to set
     */
    public void setScope(DirectoryCacheScope scope) {
        this.scope = scope;
    }

    /**

                Exclusion exclusion) {
            Dependency d = new Dependency();
            d.setGroupId(groupId);
            d.setArtifactId(artifactId);
            d.setVersion(version);
            d.setScope(scope);

            if (systemPath != null && scope.equals(Artifact.SCOPE_SYSTEM)) {
                d.setSystemPath(systemPath);
            }

            if (exclusion != null) {

        if (dependency == null) {
            return null;
        }

        org.apache.maven.artifact.Artifact result = toArtifact(dependency.getArtifact());
        result.setScope(dependency.getScope());
        result.setOptional(dependency.isOptional());

        return result;
    }

    public static org.apache.maven.artifact.Artifact toArtifact(Artifact artifact) {
        if (artifact == null) {

                Exclusion exclusion) {
            Dependency d = new Dependency();
            d.setGroupId(groupId);
            d.setArtifactId(artifactId);
            d.setVersion(version);
            d.setScope(scope);

            if (systemPath != null && scope.equals(Artifact.SCOPE_SYSTEM)) {
                d.setSystemPath(systemPath);
            }

            if (exclusion != null) {