// MNG-5368: Log a message instead of returning 'null' silently.
            this.logger.error(
                    String.format(
                            "Invalid version specification '%s' creating dependency artifact '%s'.", d.getVersion(), d),
                    e);
            return null;
        }

        Artifact artifact = artifactFactory.createDependencyArtifact(
                d.getGroupId(),

                        Collections.emptyList());
            } catch (InvalidVersionSpecificationException e) {
                throw new ArtifactMetadataRetrievalException("Invalid version creating artifacts", e, artifact);
            }
        }

        private String getKey(Artifact artifact) {
            return artifact.getDependencyConflictId();
        }

            legacySupport.setSession(session);

            // NOTE: DuplicateArtifactAttachmentException is currently unchecked, so be careful removing this try/catch!
            // This is necessary to avoid creating compatibility problems for existing plugins that use
            // MavenProjectHelper.attachArtifact(..).
            try {

            throws ArtifactResolutionException, ArtifactNotFoundException {
        resolve(artifact, remoteRepositories, localRepository, null);
    }

    /**
     * ThreadCreator for creating daemon threads with fixed ThreadGroup-name.
     */
    @Deprecated
    static final class DaemonThreadCreator implements ThreadFactory {

    // checks for duplicate projects definitions in the build. Ideally this type of duplicate checking should be
    // part of getting the reactor projects in 6). The duplicate checking is conflated with getProjectMap(projects).
    //
    // 9) Execute AbstractLifecycleParticipant.afterProjectsRead(session)
    //

            // different values than in dependencyManagement
            if (managedVersions instanceof ManagedVersionMap) {
                /* avoid modifying the managedVersions parameter creating a new map */
                versionMap = new ManagedVersionMap(managedVersions);
            }
            versionMap.remove(originatingArtifact.getDependencyConflictId());
        }

        return versionMap;

        plugin.setGroupId( "org.apache.maven.plugins" );
        plugin.setArtifactId( "maven-surefire-plugin" );
        plugin.setVersion( "2.4.2" );

        // The project has already been fully interpolated so getting the raw mojoDescriptor is not going to have the processes configuration.

                    // reset the retry flag.
                    retry = false;

                    // This should take care of creating destination directory now on
                    if (destination.exists() && !force) {
                        try {
                            downloaded = wagon.getIfNewer(remotePath, temp, destination.lastModified());