code: function changeDelegatedHandler(eventOptions = {}) {
      const { key } = eventOptions;
      const def = defs.get(this);
  
      if (key && key in def.keys) {
          triggerOne(this, '_asterisk:set', eventOptions);
      }
  }
docs: called on _change:delegated tiggers asterisk events logic by triggering _asterisk:set