}

        ResolutionGroup cached = cache.get(
                artifact,
                request.isResolveManagedVersions(),
                request.getLocalRepository(),
                request.getRemoteRepositories());

        if (cached != null
                // if the POM has no file, we cached a missing artifact, only return the cached data if no update forced

        return localRepository;
    }

    public void setLocalRepository(ArtifactRepository localRepository) {
        this.localRepository = localRepository;
    }

    public List<ArtifactRepository> getRemoteRepositories() {
        return remoteRepositories;
    }

    public void setRemoteRepositories(List<ArtifactRepository> remoteRepositories) {
        this.remoteRepositories = remoteRepositories;
    }

                    session.getSession(),
                    new VersionRequest(
                            session.toArtifact(request.getArtifactCoordinate()),
                            session.toRepositories(session.getRemoteRepositories()),
                            null));

            return new VersionResolverResult() {
                @Override
                public List<Exception> getExceptions() {

        }

        public List<ArtifactVersion> retrieveAvailableVersions(MetadataResolutionRequest request)
                throws ArtifactMetadataRetrievalException {
            return retrieveAvailableVersions(
                    request.getArtifact(), request.getLocalRepository(), request.getRemoteRepositories());
        }
    }

            Map<Artifact, Path> paths = new HashMap<>();
            ArtifactManager artifactManager = session.getService(ArtifactManager.class);
            List<RemoteRepository> repositories = session.toRepositories(session.getRemoteRepositories());
            List<ArtifactRequest> requests = new ArrayList<>();
            for (ArtifactCoordinate coord : request.getCoordinates()) {

                    session.getSession(),
                    new VersionRangeRequest(
                            session.toArtifact(request.getArtifactCoordinate()),
                            session.toRepositories(session.getRemoteRepositories()),
                            null));

            Map<String, ArtifactRepository> repos = res.getVersions().stream()
                    .filter(v -> res.getRepository(v) != null)

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

    /**
     * Gets the remote repositories to use.
     *
     * @return The remote repositories to use, never {@code null}.
     */
    List<ArtifactRepository> getRemoteRepositories();

    /**
     * Sets the remote repositories to use.
     *
     * @param remoteRepositories The remote repositories to use.
     * @return This request, never {@code null}.
     */

    /**
     * Gets the remote repositories to use for the resolution.
     *
     * @return The remote repositories to use for the resolution, never {@code null}.
     */
    List<ArtifactRepository> getRemoteRepositories();

    /**
     * Sets the remote repositories to use for the resolution.
     *
     * @param remoteRepositories The remote repositories to use for the resolution.
     * @return This request, never {@code null}.

    }

    @Override
    public List<Node> getChildren() {
        return new MappedList<>(node.getChildren(), n -> session.getNode(n, verbose));
    }

    @Override
    public List<RemoteRepository> getRemoteRepositories() {
        return new MappedList<>(node.getRepositories(), session::getRemoteRepository);
    }

    @Override
    public Optional<RemoteRepository> getRepository() {
        // TODO: v4: implement