How to get associate Workflow process from prim...

public static void getRelatedProcesses(Persistable persistable) throws Exception {
    QueryResult queryresult = WfEngineHelper.service.getAssociatedProcesses(persistable, null, ((WTContained) persistable).getContainerReference());
    while(queryresult.hasMoreElements()){
        WfProcess wfprocess = (WfProcess)queryresult.nextElement(); //          
    }           
}