return null;
    }

    @Override
    public void injectAuthentication(List<ArtifactRepository> repositories, List<Server> servers) {}

    @Override
    public void injectMirror(List<ArtifactRepository> repositories, List<Mirror> mirrors) {}

    @Override
    public void injectProxy(List<ArtifactRepository> repositories, List<Proxy> proxies) {}

    @Override
    public void publish(

    }

    @Override
    public void injectMirror(List<ArtifactRepository> repositories, List<Mirror> mirrors) {
        if (repositories != null && mirrors != null) {
            for (ArtifactRepository repository : repositories) {
                Mirror mirror = getMirror(repository, mirrors);
                injectMirror(repository, mirror);
            }
        }
    }

                    try {
                        ArtifactRepository repo = repositorySystem.buildArtifactRepository(repositoryInstance);
                        repositorySystem.injectMirror(request.getRepositorySession(), Arrays.asList(repo));
                        repositorySystem.injectProxy(request.getRepositorySession(), Arrays.asList(repo));

            } catch (InvalidRepositoryException e) {
                // cannot use this then
            }
        }
        mavenRepositorySystem.injectMirror(repositorySession, pomRepositories);
        mavenRepositorySystem.injectProxy(repositorySession, pomRepositories);
        mavenRepositorySystem.injectAuthentication(repositorySession, pomRepositories);