return new ULPlanFilter(communityToAgents, showObjectTypes, hideObjectTypes, ignoreObjectTypes);
return new ULPlanFilter(communityToAgents, (Vector)showObjectTypes.clone(), (Vector)hideObjectTypes.clone(), (Vector)ignoreObjectTypes.clone());
  public ULPlanFilter copy() {    return new ULPlanFilter(communityToAgents, showObjectTypes,			    hideObjectTypes, ignoreObjectTypes);  }