src/transformers/models/layoutlmv3/modeling_tf_layoutlmv3.py/TFLayoutLMv3PreTrainedModel/input_signature
class TFLayoutLMv3PreTrainedModel:    def input_signature(self):
        sig = super().input_signature
        sig["bbox"] = tf.TensorSpec((None, None, 4), tf.int32, name="bbox")
        return sig