* Verifies the specified plugin is compatible with the current Maven runtime.
     *
     * @param pluginDescriptor The descriptor of the plugin to check, must not be {@code null}.
     * @deprecated Use {@link #checkPrerequisites(PluginDescriptor)} instead.
     */
    @Deprecated
    void checkRequiredMavenVersion(PluginDescriptor pluginDescriptor) throws PluginIncompatibleException;

    /**

                "maven-it-plugin",
                "0.1",
                "compile",
                "jar",
                null,
                new DefaultArtifactHandler("ignore"));
        PluginDescriptor descriptor = new PluginDescriptor();
        descriptor.setGroupId("org.apache.maven.its.plugins");
        descriptor.setArtifactId("maven-it-plugin");
        descriptor.setVersion("0.1");
        List<String> errors = new ArrayList<>();

    interface PluginDescriptorSupplier {
        PluginDescriptor load()
                throws PluginResolutionException, PluginDescriptorParsingException, InvalidPluginDescriptorException;
    }

    Key createKey(Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session);

    void put(Key key, PluginDescriptor pluginDescriptor);

    PluginDescriptor get(Key key);

                    InvalidDependencyVersionException, PluginManagerException, PluginConfigurationException;

    PluginDescriptor getPluginDescriptorForPrefix(String prefix);

    Plugin getPluginDefinitionForPrefix(String prefix, MavenSession session, MavenProject project);

    PluginDescriptor verifyPlugin(
            Plugin plugin, MavenProject project, Settings settings, ArtifactRepository localRepository)

import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.RemoteRepository;

/**
 */
public interface BuildPluginManager {
    // igorf: Way too many declared exceptions!

            legacySupport.setSession(oldSession);
        }
    }

    /**
     * TODO pluginDescriptor classRealm and artifacts are set as a side effect of this
     *      call, which is not nice.
     * @throws PluginResolutionException
     */
    public ClassRealm getPluginRealm(MavenSession session, PluginDescriptor pluginDescriptor)
            throws PluginResolutionException, PluginManagerException {

        }
    }

    @Override
    public void write(XmlWriterRequest<PluginDescriptor> request) throws XmlWriterException {
        nonNull(request, "request");
        PluginDescriptor content = nonNull(request.getContent(), "content");
        Path path = request.getPath();
        OutputStream outputStream = request.getOutputStream();

import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.RemoteRepository;

/**
 */
public class BuildPluginManagerStub implements BuildPluginManager {

    public PluginDescriptor loadPlugin(

        super();
        this.runtimeInformation = runtimeInformation;
    }

    @Override
    public void accept(PluginDescriptor pluginDescriptor) {
        String requiredMavenVersion = pluginDescriptor.getRequiredMavenVersion();

        boolean isBlankVersion =
                requiredMavenVersion == null || requiredMavenVersion.trim().isEmpty();

        if (!isBlankVersion) {

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.descriptor.PluginDescriptor;

/**
 * MavenPluginValidator
 */
public interface MavenPluginValidator {

    void validate(Artifact pluginArtifact, PluginDescriptor pluginDescriptor, List<String> errors);