projects = Collections.singletonList(rootProject);
            } else {
                projects = session.getProjects();
            }
            for (MavenProject project : projects) {
                ClassLoader tccl = Thread.currentThread().getContextClassLoader();
                MavenProject currentProject = session.getCurrentProject();
                try {

     */
    void setupPluginRealm(
            PluginDescriptor pluginDescriptor,
            MavenSession session,
            ClassLoader parent,
            List<String> imports,
            DependencyFilter filter)
            throws PluginResolutionException, PluginContainerException;

    /**

}

/**
 * The build environment.
 *
 * WARNING: Every val in here must not change for they same daemon. If it does, changes will go undetected,
 *          since this whole object is kept in the classloader between builds.
 *          Anything that changes must be in a val with a get() method that recomputes the value each time.
 */
object BuildEnvironment {

    /**

        if (null == name) {
            return defaultClazz; // just use the default type
        }

        // TCCL allows surrounding container to influence class loading policy
        final ClassLoader tccl = Thread.currentThread().getContextClassLoader();
        if (tccl != null) {
            try {
                return tccl.loadClass(name);
            } catch (final Exception e) {

            boolean isMap = false;
            boolean isProperties = false;
            if (!isArray) {
                try {
                    // assuming Type is available in current ClassLoader
                    isCollection = Collection.class.isAssignableFrom(Class.forName(param.getType()));
                    isMap = Map.class.isAssignableFrom(Class.forName(param.getType()));

    private static final ConcurrentMap<Class<?>, Map<String, Field>> FIELD_CACHE = new ConcurrentHashMap<>();

    private final ConverterLookup lookup;
    private final ClassLoader loader;
    private final ExpressionEvaluator evaluator;
    private final ConfigurationListener listener;

    /**
     * Holds information about a method including its parameter type.
     */

  // TODO(cgdecker): maybe add a better way to check if a resource exists
  // e.g. Optional<URL> tryGetResource or boolean resourceExists
  public static URL getResource(String resourceName) {
    ClassLoader loader =
        MoreObjects.firstNonNull(
            Thread.currentThread().getContextClassLoader(), Resources.class.getClassLoader());
    URL url = loader.getResource(resourceName);

        }

        projectRealmCache.register(project, projectRealmKey, record);

        return record;
    }

    @Override
    public void selectProjectRealm(MavenProject project) {
        ClassLoader projectRealm = project.getClassRealm();

        if (projectRealm == null) {
            projectRealm = classRealmManager.getCoreRealm();
        }

        return markerFile.getAbsoluteFile().getParentFile();
    }

    protected static File getFileForClasspathResource(String resource)
            throws FileNotFoundException, URISyntaxException {
        ClassLoader cloader = Thread.currentThread().getContextClassLoader();

        URL resourceUrl = cloader.getResource(resource);

        if (resourceUrl == null) {

            MavenSession session,
            boolean aggregating,
            Set<Artifact> projectArtifacts)
            throws LifecycleExecutionException {
        ClassLoader tccl = Thread.currentThread().getContextClassLoader();
        try {
            ClassLoader projectRealm = project.getClassRealm();
            if (projectRealm != null && projectRealm != tccl) {
                Thread.currentThread().setContextClassLoader(projectRealm);