throws Exception {
        if (!extClassPath.isEmpty() || !extensions.isEmpty()) {
            ClassRealm extRealm = classWorld.newRealm("maven.ext", null);

            extRealm.setParentRealm(coreRealm);

            slf4jLogger.debug("Populating class realm '{}'", extRealm.getId());

            for (File file : extClassPath) {
                slf4jLogger.debug("  included '{}'", file);