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<p>It also ensures all the dataloaders are on <code>device</code> and applies to them <code>dl_tfms</code> as batch are drawn (like normalization). <code>path</code> is used internally to store temporary files, <code>collate_fn</code> is passed to the pytorch <code>Dataloader</code> (replacing the one there) to explain how to collate the samples picked for a batch. By default, it applies data to the object sent (see in 