Artifact a = createArtifact("a", "0.0.1-SNAPSHOT");
        File file = new File(localRepository.getBasedir(), localRepository.pathOf(a));
        file.delete();
        a.setFile(file);

        File touchFile = updateCheckManager.getTouchfile(a);
        touchFile.delete();

        assertTrue(updateCheckManager.isUpdateRequired(a, remoteRepository));

        file.getParentFile().mkdirs();
        file.createNewFile();

            if (file.exists()) {
                if (file.isDirectory()) {
                    FileUtils.deleteDirectory(file);
                } else {
                    file.delete();
                }
            }

            it.remove();
        }

        warnAboutCleanup = false;
    }

        if (metadataFile.length() == 0) {
            if (!metadataFile.delete()) {
                // sleep for 10ms just in case this is windows holding a file lock
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    // ignore
                }
                metadataFile.delete(); // if this fails, forget about it, we'll try to overwrite it anyway so no need

 * that is only public for technical reasons, it is not part of the public API. In particular, this interface can be
 * changed or deleted without prior notice.
 *
 * @since 3.0
 */
public interface PluginDependenciesResolver {

    /**
     * Resolves the main artifact of the specified plugin.
     *

/**
 * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
 * of the public API. In particular, this class can be changed or deleted without prior notice.
 *
 */
public class ArtifactDescriptorUtils {

    public static Artifact toPomArtifact(Artifact artifact) {
        Artifact pomArtifact = artifact;