        <td><code>token2label</code></td>
          <td>
                <code><span title="typing.Dict">Dict</span>[str, int], optional</code>
          </td>
          <td><p>A dictionary mapping SMILES tokens to integer labels. If <code>None</code>, the labels will
be learned from the dataset, which is useful to create the train dataloader. The validation and test dataloaders
should use the same <code>token2label</code> learned during the creation of the train dataloader.
The default is <code>None</code>