@Override
 public void removeBlocReference(String blocReferenceId) {
   if (composantsBlocsListWidget != null)
     composantsBlocsListWidget.removeBlocReference(blocReferenceId);
 }
 @Override
 public void addDeleteBlocReferenceClickHandler(ClickHandler clickHandler) {
   if (clickHandler != null) {
     composantsBlocsListWidget.addDeleteClickHandler(clickHandler);
   }
 }
 @Override
 public String getPageIdByBlocReference(String blocReferenceId) {
   if (composantsBlocsListWidget != null)
     return composantsBlocsListWidget.getPageIdByBlocReference(blocReferenceId);
   return null;
 }
 @Override
 public void setBlocsListUsedComposant(List<ComposantBean> beans) {
   if (beans != null && composantsBlocsListWidget != null)
     composantsBlocsListWidget.setValue(beans);
 }