rptSvcClazz =  OpenmrsClassLoader.getInstance().loadClass("org.openmrs.module.reporting.cohort.definition.service.CohortDefinitionService");
 obj = Context.getService(rptSvcClazz);
 method = rptSvcClazz.getMethod("getDefinitionTypes");
 allCohortDefTypes = method.invoke(obj);
 println "Defined cohort definition types: " + allCohortDefTypes​