code: @Override
      public void unset(String propName) {
          if (propName.equals("deleteDescendants")) {
              unsetDeleteDescendants();
          }
          if (propName.equals("returnDeleted")) {
              unsetReturnDeleted();
          }
          super.unset(propName);
      }
docs: Sets the value of provided property to null.
  
  @param propName
  allowed object is {@link String}