this.externalRepositories = Collections.unmodifiableList(new ArrayList<>(repositories));
        this.repositories = new ArrayList<>();
        this.repositories.addAll(externalRepositories);
        this.repositoryMerging = repositoryMerging;
        this.repositoryIds = new HashSet<>();
        this.modelPool = modelPool;
    }

    private ProjectModelResolver(ProjectModelResolver original) {

        this.repositories = remoteRepositoryManager.aggregateRepositories(session, repositories, newRepositories, true);
    }

    private static void removeMatchingRepository(Iterable<RemoteRepository> repositories, final String id) {
        Iterator<RemoteRepository> iterator = repositories.iterator();
        while (iterator.hasNext()) {
            RemoteRepository remoteRepository = iterator.next();

        /**
         * Sets the repositories to use for resolving the version range.
         *
         * @param repositories the repositories, or {@code null} to use the session's repositories
         * @return this builder, never {@code null}
         */
        public VersionResolverRequestBuilder repositories(List<RemoteRepository> repositories) {
            this.repositories = repositories;
            return this;
        }

        /**
         * Sets the list of remote repositories to use for resolving dependencies during project building.
         * These repositories will be used in addition to any repositories defined in the project itself.
         *
         * @param repositories the list of remote repositories
         * @return this builder instance
         */
        public ProjectBuilderRequestBuilder repositories(List<RemoteRepository> repositories) {

    /**
     * The possible merge modes for combining remote repositories.
     */
    enum RepositoryMerging {

        /**
         * The repositories declared in the POM have precedence over the repositories specified in the request.
         */
        POM_DOMINANT,

        /**
         * The repositories specified in the request have precedence over the repositories declared in the POM.
         */
        REQUEST_DOMINANT,

    @Override
    public List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories) {
        if (repositories == null) {
            return null;
        }

        Map<String, List<ArtifactRepository>> reposByKey = new LinkedHashMap<>();

        for (ArtifactRepository repository : repositories) {
            String key = repository.getId();

    /**
     * Creates a derived session using the given remote repositories.
     *
     * @param repositories the new list of remote repositories
     * @return the derived session
     * @throws NullPointerException if {@code repositories} is null
     */
    @Nonnull
    Session withRemoteRepositories(@Nonnull List<RemoteRepository> repositories);

    /**

        Artifact l = createRemoteArtifact("l", "1.0-SNAPSHOT");
        deleteLocalArtifact(l);

        List<ArtifactRepository> repositories = new ArrayList<>();
        repositories.add(remoteRepository());
        repositories.add(badRemoteRepository());

        artifactResolver.resolve(l, repositories, localRepository());

        assertLocalArtifactPresent(l);
    }

    @Test

            Artifact pluginArtifact,
            DependencyFilter dependencyFilter,
            List<RemoteRepository> repositories,
            RepositorySystemSession session)
            throws PluginResolutionException {
        return resolveInternal(plugin, pluginArtifact, dependencyFilter, repositories, session);
    }

    @Override
    public DependencyNode resolve(
            Plugin plugin,

            this.repositories.add(localRepository);
            this.repositories.addAll(remoteRepositories);

            int hash = 17;
            hash = hash * 31 + artifactHashCode(artifact);
            hash = hash * 31 + (resolveManagedVersions ? 1 : 2);
            hash = hash * 31 + repositoriesHashCode(repositories);
            this.hashCode = hash;
        }

        @Override