return makeSubTask(ldmf, plan, parent.getUID(), verb, prepphrases,
return makeSubTask(ldmf, plan, (parent != null) ? parent.getUID() : null, verb, prepphrases,
  public NewTask makeSubTask(RootFactory ldmf,				    Plan plan, 				    Task parent, 				    Verb verb, 				    Enumeration prepphrases, 				    Asset obj, 				    Enumeration preferences,				    byte priority,				    ClusterIdentifier source) {    return makeSubTask(ldmf, plan, parent.getUID(), verb, prepphrases, 		       obj, preferences, priority, source);  }