AttributeError: 'Learner' object has no attribute 'hooks'

[hyperL1ght]

Hi artste,

Thank you so much for create this useful visualizing tools. When I use your code, I run into this problem, after fitting the model with ActivationsHistogram callback, I got AttributeError: 'Learner' object has no attribute 'hooks' when trying to run learn.get_preds(with_loss=True, ds_type=DatasetType.Train). I tried it on an example notebook you provided (sample_usage.ipynb) and got the same error. How should I go about handling it?