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I've just discovered the `allow_failure`  utility - is there something similar to invoke *only* when an upstream task fails?
My use case is a flow running dbt models, I want to run failed models when the original task fails

Or something like this:
```    state = trigger_dbt_cli_command(
        command="dbt build -s +tag:mytags+",
        **trigger_kwargs,
        wait_for=[deps],
    )

    if state.is_failed():
        trigger_dbt_cli_command(
            command="dbt build -s +tag:mytags+ result:error+ --defer --state ./targets",
            **trigger_kwargs,
            wait_for=[allow_failure(state)],
        )```


You’d need to add `return_state=True` to that first call

but yeah you can use if statements looking at the state or try/except retrieving the result