class_docstr: NNOp to triton model.
class_docstr_tok: ["NNOp","to","triton","model","."]
code: def _save_onnx_model(self):
      self._backend = "onnxruntime"
      try:
          if self._prepare_config() and self._op.save_model(
              "onnx", self._triton_files.onnx_model_file
          ):
              return 1
      except Exception as e:  # pylint: disable=broad-except
          st_err = "{}, {}".format(str(e), traceback.format_exc())
          engine_log.error(
              "Save the operator: %s with onnx model failed, error: %s",
              self._name,
              st_err,
          )
          return -1
  
file_path: towhee/towhee/serve/triton/model_to_triton.py
imports: import traceback
  from towhee.utils.log import engine_log
  from towhee.utils.onnx_utils import onnx
  from towhee.serve.triton import constant
  from towhee.serve.triton.triton_config_builder import create_modelconfig
  from towhee.serve.triton.triton_files import TritonFiles
label_desc: Use image node_id 4 for calling the ModelToTriton obj's underlying member method code with example usage: obj._save_onnx_model() and returns: int, unknown