*
 * <p>If you have your own graph implementation based around a custom node type {@code MyNode},
 * which has a method {@code getParents()} that retrieves its predecessors in a graph:
 *
 * {@snippet :
 * someGraphAlgorithm(startNode, MyNode::getParents);
 * }
 *
 * <p>If you have some other mechanism for returning the predecessors of a node, or one that doesn't

 *
 * <p>If you have your own graph implementation based around a custom node type {@code MyNode},
 * which has a method {@code getParents()} that retrieves its predecessors in a graph:
 *
 * {@snippet :
 * someGraphAlgorithm(startNode, MyNode::getParents);
 * }
 *
 * <p>If you have some other mechanism for returning the predecessors of a node, or one that doesn't

        }

        String getLabel() {
            return label;
        }

        List<Vertex> getChildren() {
            return children;
        }

        List<Vertex> getParents() {
            return parents;
        }
    }

        }

        String getLabel() {
            return label;
        }

        List<Vertex> getChildren() {
            return children;
        }

        List<Vertex> getParents() {
            return parents;
        }
    }

    static class CycleDetectedException extends RuntimeException {
        private final List<String> cycle;

        }
        return element
    }

    protected Element createNode(Object name, Object value) {
        return createNode(name, [:], value)
    }

    protected void setParent(Object parent, Object child) {
        parent.appendChild(child)
    }

    def appendChild(Node node) {
        if (!current) {
            elements << (Element) document.importNode(node, true)
        } else  {

            "Method" to "$containingType.fooExt(java.lang.String)",
            "Method" to "$containingType.fooExt(int)",
            "Method" to "$containingType.getBar()",
            "Method" to "$containingType.getBarExt(java.lang.String)",
            "Method" to "$containingType.getBazar()",
            "Method" to "$containingType.getBazarExt(int)",
        ) + (if (isEnum) listOf(
            "Method" to "$containingType.getEntries()",

        Parent parent = new Parent();

        parent.setGroupId("test-group");
        parent.setVersion("1000");
        parent.setArtifactId("test-artifact");

        Model model = new Model();

        model.setParent(parent);
        model.setArtifactId("real-artifact");

        MavenProject project = new MavenProject(model);

        assertEquals("test-group", project.getGroupId(), "groupId proto-inheritance failed.");

        Parent parent = new Parent();
        parent.setGroupId(parentProject.getGroupId());
        parent.setArtifactId(parentProject.getArtifactId());
        project.getModel().setParent(parent);
        return project;
    }

    private MavenProject getMavenProject(String artifactId) {
        MavenProject mavenProject = new MavenProject();
        mavenProject.setGroupId(GROUP_ID);