@Override
 public String getPreviousOccurenceActionName() {
   return mySupport != null ? mySupport.getPreviousOccurenceActionName() : "";
 }
 @Override
 public OccurenceInfo goPreviousOccurence() {
   return mySupport != null ? mySupport.goPreviousOccurence() : null;
 }
 @Override
 public boolean hasPreviousOccurence() {
   return mySupport != null && mySupport.hasPreviousOccurence();
 }
 @Override
 public OccurenceInfo goNextOccurence() {
   return mySupport != null ? mySupport.goNextOccurence() : null;
 }
 @Override
 public boolean hasNextOccurence() {
   return mySupport != null && mySupport.hasNextOccurence();
 }