code: def trigger_update(self, trigger_parent=True):
          
          if not self.update_model() or (hasattr(self, "_in_init_") and self._in_init_):
              #print "Warning: updates are off, updating the model will do nothing"
              return
          self._trigger_params_changed(trigger_parent)
docs: Update the model from the current state.
          Make sure that updates are on, otherwise this
          method will do nothing
  
          :param bool trigger_parent: Whether to trigger the parent, after self has updated