Liferay: Get OSGi Service in Groovy

getOSGiService.groovy

import com.liferay.registry.Registry
import com.liferay.registry.RegistryUtil
import com.liferay.registry.ServiceReference

def getService(Class clazz) {
    Registry registry = RegistryUtil.getRegistry();

    ServiceReference serviceReference = registry.getServiceReference(clazz);

    return registry.getService(serviceReference);
}