docstr: Wrapper of ONNX-Chainer converter
  
  Exporter set arguments wrapped by ``FunctionConverterParams``, and
  this class breaks downs to each argument.
  
  Arguments:
      converter (function): The target converter function.
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code: def __init__(self, converter):
      """Wrapper of ONNX-Chainer converter
  
      Exporter set arguments wrapped by ``FunctionConverterParams``, and
      this class breaks downs to each argument.
  
      Arguments:
          converter (function): The target converter function.
      """
  
      self.converter = converter
  
label_desc: Use image node_id 1 to create a new FunctionConverter object from inherited base classes: object with example: obj = FunctionConverter(converter)