  void WillReleaseScriptContext(v8::Local<v8::Context> context,
                                int world_id) final {
    // Unset spell checker when the script context is going to be released, as
    // the spell check implementation lives there.
    UnsetAndDestroy();
  }
  void WillReleaseScriptContext(v8::Local<v8::Context> context,
                                int world_id) final {
     
     
    UnsetAndDestroy();
  }