<a href="/vision.image.html#vision.image"><code>vision.image</code></a> or the <a href="/data_block.html">data block API</a> why this can be important).</p>
<p><code>train_dl</code>, <code>valid_dl</code> and optionally <code>test_dl</code> will be wrapped in <a href="/basic_data.html#DeviceDataLoader"><code>DeviceDataLoader</code></a>.</p>

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