src/transformers/modeling_tf_utils.py/TFPreTrainedModel/get_prefix_bias_name
class TFPreTrainedModel:    def get_prefix_bias_name(self) -> Union[None, str]:
        """
        Get the concatenated _prefix name of the bias from the model name to the parent layer

        Return:
            `str`: The _prefix name of the bias.
        """
        warnings.warn("The method get_prefix_bias_name is deprecated. Please use `get_bias` instead.", FutureWarning)
        return None