code: func (v *TextTag) Event(eventObject *glib.Object, event *gdk.Event, iter *TextIter) bool {
  	ok := C.gtk_text_tag_event(v.native(),
  		(*C.GObject)(unsafe.Pointer(eventObject.Native())),
  		(*C.GdkEvent)(unsafe.Pointer(event.Native())),
  		(*C.GtkTextIter)(iter),
  	)
  	return gobool(ok)
  }
docs: // Event() is a wrapper around gtk_text_tag_event().