code: protected boolean clear() {
          log.debug("clear");
          super.removeAttributes();
          // send confirmation to client
          ownerMessage.addEvent(Type.CLIENT_CLEAR_DATA, name, null);
          notifyModified();
          changeStats.incrementAndGet();
          return true;
      }
docs: Deletes all the attributes and sends a clear event to all listeners. The persistent data object is also removed from a persistent
  shared object.
  
  @return true on success, false otherwise