input docs an exampels

src/textual/message_pump.py

@@ -417,7 +417,7 @@ class MessagePump(metaclass=MessagePumpMeta):
                 # parent is sender, so we stop propagation after parent
                 message.stop()
             if self.is_parent_active and not self._parent._closing:
-                await self._parent.post_message(message)
+                await message._bubble_to(self._parent)
 
     def check_idle(self) -> None:
         """Prompt the message pump to call idle if the queue is empty."""