src/transformers/models/roc_bert/tokenization_roc_bert.py/RoCBertTokenizer/_convert_token_to_shape_id
class RoCBertTokenizer:    def _convert_token_to_shape_id(self, token):
        """Converts a token (str) in an shape_id using the shape vocab."""
        return self.word_shape.get(token, self.word_shape.get(self.unk_token))