docstr: :return: list of inputs
code: def _extract_model_inputs(self):
      """
      :return: list of inputs
      """
      assert len(self._input_list) == 2, "Mul should have 2 inputs"
      return [self._to_zoo_input(oi) for oi in self._input_list]
  
file_path: analytics-zoo/pyzoo/zoo/pipeline/api/onnx/mapper/div.py
imports: from zoo.pipeline.api.onnx.mapper.operator_mapper import OperatorMapper
  from zoo.pipeline.api.onnx.onnx_helper import OnnxHelper
  import zoo.pipeline.api.autograd
  import zoo.pipeline.api.keras.layers
label_desc: Use image node_id 2 for calling the DivMapper obj's underlying member method code with example usage: obj._extract_model_inputs() and returns: unknown