src/transformers/models/dpr/modeling_tf_dpr.py/TFDPRReader/get_input_embeddings
class TFDPRReader:    def get_input_embeddings(self):
        try:
            return self.span_predictor.encoder.bert_model.get_input_embeddings()
        except AttributeError:
            self(self.dummy_inputs)
            return self.span_predictor.encoder.bert_model.get_input_embeddings()