abstract org.eclipse.aether.graph.DependencyNode getDependencyNode();

    @Override
    public boolean accept(NodeVisitor visitor) {
        if (visitor.enter(this)) {
            for (Node child : getChildren()) {
                if (!child.accept(visitor)) {
                    break;
                }
            }
        }
        return visitor.leave(this);
    }

    @Override

     */
    @Nonnull
    String getLocation();

    /**
     * Returns a new source identified by a relative path. Implementation <strong>MUST</strong>
     * be able to accept <code>relative</code> parameter values that
     * <ul>
     * <li>use either / or \ file path separator,</li>
     * <li>have .. parent directory references,</li>
     * <li>point either at file or directory.</li>

        List<IllegalStateException> prerequisiteExceptions = new ArrayList<>();
        prerequisitesCheckers.forEach(c -> {
            try {
                c.accept(pluginDescriptor);
            } catch (IllegalStateException e) {
                prerequisiteExceptions.add(e);
            }
        });
        // aggregate all exceptions

            AtomicReference<Model> m = new AtomicReference<>(model);

            ModelBuildingEvent event = new DefaultModelBuildingEvent(model, m::set, request, problems);

            catapult.accept(listener, event);

            return m.get();
        }

        return model;
    }

    private boolean containsCoordinates(String message, String groupId, String artifactId, String version) {

     * requested that all dependencies are placed on the classpath, with no module-path element.
     *
     * @param scopeFilter a filter returning {@code true} for the artifact scopes to accept.
     * @param includeTestDir whether to include the test directory in the classpath elements.
     * @return paths of all artifacts placed on the classpath.

            List<String> nodeTrail = new ArrayList<>(trail.size() + 1);
            nodeTrail.addAll(trail);
            nodeTrail.add(artifact.getId());

            if (filter == null || filter.accept(node, Collections.emptyList())) {
                artifact.setDependencyTrail(nodeTrail);
                artifacts.add(artifact);
            }

            toArtifacts(artifacts, node.getChildren(), nodeTrail, filter);

                        .build());
                org.apache.maven.model.building.ModelSource modelSource = resolver.resolveModel(p);
                if (!p.getVersion().equals(version)) {
                    resolved.accept(p.getVersion());
                }
                return toSource(modelSource);
            } catch (UnresolvableModelException e) {

            node = repoSystem.collectDependencies(pluginSession, request).getRoot();

            if (logger.isDebugEnabled()) {
                node.accept(new DependencyGraphDumper(logger::debug));
            }

            depRequest.setRoot(node);
            return repoSystem.resolveDependencies(session, depRequest);
        } catch (DependencyCollectionException e) {

/**
 * This interface supplies the API for providing feedback to the user from the <code>Mojo</code>, using standard
 * <code>Maven</code> channels.<br>
 * There should be no big surprises here, although you may notice that the methods accept
 * <code>java.lang.CharSequence</code> rather than <code>java.lang.String</code>. This is provided mainly as a
 * convenience, to enable developers to pass things like <code>java.lang.StringBuffer</code> directly into the logger,

            and not the licenses that apply to dependencies.
            If multiple licenses are listed, it is assumed that the user can select
            any of them, not that they must accept all.
            ]]>
          </description>
          <association>
            <type>License</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>