return parent;
    }

    public void setParent(MetadataTreeNode parent) {
        this.parent = parent;
    }

    public MetadataTreeNode[] getChildren() {
        return children;
    }

    public void setChildren(MetadataTreeNode[] children) {
        this.children = children;
    }
    // ------------------------------------------------------------------------

        while (element.hasChildNodes()) {
            element.removeChild(element.getFirstChild())
        }
        element.appendChild(element.ownerDocument.createTextNode(value))
    }

    public static void setChildren(Node element, Closure cl) {
        while (element.hasChildNodes()) {
            element.removeChild(element.getFirstChild())
        }
        leftShift(element, cl)
    }

    @Nullable
    Dependency getDependency();

    /**
     * Gets the child nodes of this node.
     *
     * @return the child nodes of this node, never {@code null}
     */
    @Nonnull
    List<Node> getChildren();

    /**
     * @return repositories of this node
     */
    @Nonnull
    List<RemoteRepository> getRemoteRepositories();

    /**
     * The repository where this artifact has been downloaded from.

        assertEquals("m", node.getPrefix());
        assertEquals("configuration", node.getName());
        assertEquals(1, node.getChildren().size());
        XmlNode myConfig = node.getChildren().get(0);
        assertEquals("http://fabric8.io/fabric8-maven-plugin", myConfig.getNamespaceUri());
        assertEquals("", myConfig.getPrefix());

            throws PlexusConfigurationException {
        List<MojoDescriptor> mojos = new ArrayList<>();

        PlexusConfiguration[] mojoConfigurations = c.getChild("mojos").getChildren("mojo");

        for (PlexusConfiguration component : mojoConfigurations) {
            mojos.add(buildComponentDescriptor(component, pluginDescriptor));
        }
        return mojos;
    }

        return exception;
    }

    public String getMessage() {
        return message;
    }

    public String getReference() {
        return reference;
    }

    public List<ExceptionSummary> getChildren() {
        return children;
    }

            if (tree == null) {
                tree = node;
            }

            if (parent != null) {
                parent.setNChildren(1);
                parent.addChild(0, node);
            }

            parent = node;
        }
        return tree;
    }

    public void setClasspath(List<ArtifactMetadata> classpath) {

    /**
     * Gets the children of this result.
     *
     * @return the children of this result, can be empty but never {@code null}
     */
    @Nonnull
    List<? extends ModelBuilderResult> getChildren();

    /**
     * Creates a human-readable representation of these errors.
     */
    String toString();

            addEdge(parentVertex, vertex, e);
        } else {
            entry = vertex;
        }

        MetadataTreeNode[] kids = node.getChildren();
        if (kids == null || kids.length < 1) {
            return;
        }

        for (int i = 0; i < kids.length; i++) {
            MetadataTreeNode n = kids[i];

    @Nullable
    String getValue();

    @Nonnull
    Map<String, String> getAttributes();

    @Nullable
    String getAttribute(@Nonnull String name);

    @Nonnull
    List<XmlNode> getChildren();

    @Nullable
    XmlNode getChild(String name);

    @Nullable
    Object getInputLocation();

    default XmlNode merge(@Nullable XmlNode source) {