1. Install requirements in a new venv. pip install -r requirements.txt'
2. Run the server. python manage.py runserver
3. Open the GraphiQL interface at http://localhost:8000/graphql/
4. Run the following queries to see the difference between the two implementations of the WithClientIdInputManualExtension:

# This works
{
  foos {
    results {
      id
    }
  }
}

# This breaks when as it tries to go down the sync resolver path in the WithClientIdInputManualExtension
{
  foos(withClientId:"2") {
    results {
      id
    }
  }
}