if (vertex != null) {
                    addEdge(projectVertex, vertex, project, projectMap, force, safe);
                }
            } else {
                for (Vertex vertex : vertices.values()) {
                    addEdge(projectVertex, vertex, project, projectMap, force, safe);
                }
            }
        }
    }

    private void addEdge(

            throws TransferFailedException, ResourceDoesNotExistException;

    void getArtifact(
            Artifact artifact,
            List<ArtifactRepository> remoteRepositories,
            TransferListener transferListener,
            boolean force)
            throws TransferFailedException, ResourceDoesNotExistException;

                                    + repository.getId() + " has elapsed or updates are forced.");
                }
            }
        }
    }

    @Override
    public void getArtifact(
            Artifact artifact,
            List<ArtifactRepository> remoteRepositories,
            TransferListener downloadMonitor,
            boolean force)
            throws TransferFailedException, ResourceDoesNotExistException {

                Arguments.of(true, new String[] {"--force-interactive"}, false),
                Arguments.of(true, new String[] {"--force-interactive", "--non-interactive"}, false),
                Arguments.of(true, new String[] {"--force-interactive", "--batch-mode"}, false),
                Arguments.of(true, new String[] {"--force-interactive", "--non-interactive", "--batch-mode"}, false),

        if (proxies == null) {
            proxies = new ArrayList<>();
        }

        return proxies;
    }

    //
    // Used by Tycho and will break users and force them to upgrade to Maven 3.1 so we should really leave
    // this here, possibly indefinitely.
    //
    public ArtifactResolutionRequest setCache(RepositoryCache cache) {
        return this;
    }

     */
    boolean required() default false;

    /**
     * Specifies that this parameter cannot be configured directly by the user (as in the case of POM-specified
     * configuration). This is useful when you want to force the user to use common POM elements rather than plugin
     * configurations, as in the case where you want to use the artifact's final name as a parameter. In this case, you

     * @param problem The problem whose location should be formatted, must not be {@code null}.
     * @param projectId The {@code <groupId>:<artifactId>:<version>} of the corresponding project, may be {@code null}
     *            to force output of model id and source.
     * @return The formatted problem location or an empty string if unknown, never {@code null}.
     */
    public static String formatLocation(ModelProblem problem, String projectId) {

 * for exclusive consumption by the repository system and is opaque to the cache implementation.
 *
 */
@Deprecated
//
// Used by Tycho and will break users and force them to upgrade to Maven 3.1 so we should really leave
// this here, possibly indefinitely.
//
public interface RepositoryCache {

    /**

    public static final char BATCH_MODE = 'B';

    public static final String NON_INTERACTIVE = "non-interactive";

    public static final String FORCE_INTERACTIVE = "force-interactive";

    public static final char SET_USER_PROPERTY = 'D';

    /**
     * @deprecated Use {@link #SET_USER_PROPERTY}
     */
    @Deprecated

     * @param problem The problem whose location should be formatted, must not be {@code null}.
     * @param projectId The {@code <groupId>:<artifactId>:<version>} of the corresponding project, may be {@code null}
     *            to force output of model id and source.
     * @return The formatted problem location or an empty string if unknown, never {@code null}.
     */
    public static String formatLocation(ModelProblem problem, String projectId) {