init_op: Op for initialization.
      assets_collection: Assets collection. This collection is a list of string
        tensors. Each tensor contains the asset file names.
    """
    v1_builder = builder.SavedModelBuilder(saved_model_path)
    sig_def = signature_def_utils_impl.predict_signature_def(
        inputs=inputs, outputs=outputs
    )

    v1_builder.add_meta_graph_and_variables(
        sess,
        tags,