docstr: :return: list of OnnxInput
docstr_tok: [":","return",":","list","of","OnnxInput"]
code: def _extract_model_inputs(self):
      """
      :return: list of OnnxInput
      """
      return [self._to_zoo_input(i) for i in self._input_list]
  
file_path: analytics-zoo/pyzoo/zoo/pipeline/api/onnx/mapper/operator_mapper.py
imports: import zoo.pipeline.api.keras.layers
  import zoo.pipeline.api.autograd
  from zoo.pipeline.api.onnx.onnx_helper import OnnxHelper
  import zoo.pipeline.api.onnx.mapper
  import importlib
  import numpy
label_desc: Use image node_id 6 for calling the OperatorMapper obj's underlying member method code with example usage: obj._extract_model_inputs() and returns: unknown