r/fastai/basic_data.py#L54" class="source_link" style="float:right">[source]</a><a class="source_link" data-toggle="collapse" data-target="#DeviceDataLoader-add_tfm-pytest" style="float:right; padding-right:10px">[test]</a></h4><blockquote><p><code>add_tfm</code>(<strong><code>tfm</code></strong>:<code>Callable</code>)</p>
</blockquote>
<div class="collapse" id="DeviceDataLoader-add_tfm-pytest"><div class="card card-body pytest_card"><a type="button" data-toggle="collapse" data-target="#DeviceDataLoader-add