code: public boolean remove(final ServerPresentationModel pm) {
          boolean deleted = super.remove(pm);
          if (!deleted) {
              throw new IllegalStateException("Model " + pm + " not found on the server!");
          }
          deleteCommand(getCurrentResponse(), pm.getId());
          return deleted;
      }
docs: Convenience method to let Dolphin removePresentationModel a presentation model directly on the server and notify the client.