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What would be the best way to access variables from within a Flow in a State Handler?  I'm making a Flow that runs Jupyter notebooks, and on failure I want to post a link to the failed notebook file to slack.  There's a task earlier in the flow that generates the filepath.

I had a version in Prefect 1 that used something like this
```            flow_run = FlowRunView.from_flow_run_id(flow_run_id=flow_run_id)
            task_runs = flow_run.get_all_task_runs()
            output_path_task = [
                x for x in task_runs if "make_output_path" in x.task_slug
            ][0]```