List<Plugin> src = source.getPlugins();
            if (!src.isEmpty()) {
                List<Plugin> tgt = target.getPlugins();

                Map<Object, Plugin> merged = new LinkedHashMap<>((src.size() + tgt.size()) * 2);

                for (Plugin element : tgt) {
                    Object key = getPluginKey().apply(element);
                    merged.put(key, element);
                }

        Collection<String> deactivatedIds = new HashSet<>(context.getInactiveProfileIds());

        List<Profile> activeProfiles = new ArrayList<>(profiles.size());
        List<Profile> activePomProfilesByDefault = new ArrayList<>();
        boolean activatedPomProfileNotByDefault = false;

        for (Profile profile : profiles) {

            }
        } else if (request.getValidationLevel() >= ModelBuilderRequest.VALIDATION_LEVEL_MAVEN_2_0) {
            Set<String> modules = new HashSet<>();
            for (int i = 0, n = m.getModules().size(); i < n; i++) {
                String module = m.getModules().get(i);
                if (!modules.add(module)) {
                    addViolation(
                            problems,

     * In a package hierarchy, the {@linkplain #descriptors} map has either zero or one entry.
     * In a module hierarchy, the descriptors map may have an arbitrary number of entries,
     * including one (so the map size cannot be used as a criterion).
     *
     * @see #isModuleHierarchy()
     */
    private final boolean isModuleHierarchy;

    /**
     * Constructs an empty instance for non-modular dependencies.
     *

        }
    }

    private Model assembleInheritance(
            List<Model> lineage, ModelBuilderRequest request, ModelProblemCollector problems) {
        Model parent = lineage.get(lineage.size() - 1);
        for (int i = lineage.size() - 2; i >= 0; i--) {
            Model child = lineage.get(i);
            parent = inheritanceAssembler.assembleModelInheritance(child, parent, request, problems);
        }
        return parent;

                        }
                    } else {
                        pending.add(element);
                    }
                }

                List<Plugin> result = new ArrayList<>(src.size() + tgt.size());
                for (Map.Entry<Object, Plugin> entry : master.entrySet()) {
                    List<Plugin> pre = predecessors.get(entry.getKey());
                    if (pre != null) {

                        }
                    } else {
                        pending.add(element);
                    }
                }

                List<Plugin> result = new ArrayList<>(src.size() + tgt.size());
                for (Map.Entry<Object, Plugin> entry : master.entrySet()) {
                    List<Plugin> pre = predecessors.get(entry.getKey());
                    if (pre != null) {

        if (!modelIds.isEmpty()) {
            String modelId = modelIds.get(0);
            StringBuilder sb = new StringBuilder();
            sb.append(problems.size())
                    .append(
                            (problems.size() == 1)
                                    ? " problem was "
                                    : " problems were encountered while building the effective model");

                            modified = true;
                        }
                    }
                }

                if (modified) {
                    List<Dependency> newDeps = new ArrayList<>(dependencies.size());
                    for (Dependency dep : model.getDependencies()) {
                        Object key = getDependencyKey().apply(dep);
                        Dependency dependency = dependencies.get(key);

                MAVEN_METADATA_XML,
                Metadata.Nature.RELEASE_OR_SNAPSHOT);

        List<MetadataRequest> metadataRequests =
                new ArrayList<>(request.getRepositories().size());

        metadataRequests.add(new MetadataRequest(metadata, null, request.getRequestContext()));

        for (RemoteRepository repository : request.getRepositories()) {