How to use react()

[ssh2003]

Hello!
I see in the documentation react. Does someone use it and maybe have a working example?
Thanks a lot!

[ssh2003]

My example:

class BigTasty(MachineBasePlugin):
  @respond_to(r"^big_tasty")
  async def big_tasty(self, msg):
    await msg.react(emoji = "thumbsup")