*
     * @param repositories The original repositories, may be {@code null}.
     * @return The effective repositories or {@code null} if the input was {@code null}.
     */
    List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories);

    /**
     * Determines the mirror for the specified repository.
     *
     * @param repository The repository to determine the mirror for, must not be {@code null}.

    public Artifact createProjectArtifact(String groupId, String artifactId, String version) {
        return createArtifact(groupId, artifactId, version, "pom");
    }

    public List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories) {
        return repositories;
    }

    public Mirror getMirror(ArtifactRepository repository, List<Mirror> mirrors) {
        return null;
    }

                if (repoIds.add(repository.getId())) {
                    artifactRepositories.add(repository);
                }
            }
        }

        artifactRepositories = repositorySystem.getEffectiveRepositories(artifactRepositories);

        return artifactRepositories;
    }

    public synchronized ProjectRealmCache.CacheRecord createProjectRealm(

    }

    /**
     * Source from org.apache.maven.repository.legacy.LegacyRepositorySystem#getEffectiveRepositories
     *
     * @param repositories a list of repositories
     * @return corresponding effective repositories
     * @since 3.6.1
     */
    public List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories) {
        if (repositories == null) {
            return null;

    //        proxies.put( protocol, proxyInfo );
    //
    //        wagonManager.addProxy( protocol, host, port, username, password, nonProxyHosts );
    //    }

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

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