AuthenticationSelector authenticationSelector) {
        injectMirror(mavenExecutionRequest.getRemoteRepositories(), mavenExecutionRequest.getMirrors());
        injectProxy(proxySelector, mavenExecutionRequest.getRemoteRepositories());
        injectAuthentication(authenticationSelector, mavenExecutionRequest.getRemoteRepositories());

     *
     * @param repositories The repositories into which to inject the mirror information, may be {@code null}.
     * @param mirrors The available mirrors, may be {@code null}.
     */
    void injectMirror(List<ArtifactRepository> repositories, List<Mirror> mirrors);

    /**
     * Injects the proxy information into the specified repositories. For each repository that is matched by a proxy,

        RepositorySystemSession session = rss(c);

        ArtifactRepository repository = repositorySystem.buildArtifactRepository(repo);

        if (session != null) {
            repositorySystem.injectMirror(session, Arrays.asList(repository));
            repositorySystem.injectProxy(session, Arrays.asList(repository));
            repositorySystem.injectAuthentication(session, Arrays.asList(repository));
        }

                throw new IllegalStateException("Unable to lookup " + RepositorySystem.class.getName());
            }

            if (mirrors) {
                repositorySystem.injectMirror(session, repositories);
            }

            repositorySystem.injectProxy(session, repositories);

            repositorySystem.injectAuthentication(session, repositories);
        }