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Hello, I am trying to use the 'gmail_notifier' utility to send me a message when my process fails.  I used the code from the example as a state handler for an individual task.  just like this:

@task(state_handlers=[gmail_notifier(only_states=[Failed])])

and I get the following error:

NameError: name 'Failed' is not defined

I have tried many different combinations of state classes and ignore/only parameters - I get the same message.  Thank you.

Hi <@UMJRQ3UPL> if you haven’t imported the `Failed` state object, then python doesn’t know what you’re referring to.  You’ll need to do:
```
from prefect.engine.state import Failed
```