code: def convert_argmax(node, **kwargs):
      
      name, input_nodes, attrs = get_inputs(node, kwargs)
  
      axis = int(attrs.get("axis"))
      keepdims = get_boolean_attribute_value(attrs, "keepdims")
  
      node = onnx.helper.make_node(
          'ArgMax',
          inputs=input_nodes,
          axis=axis,
          keepdims=keepdims,
          outputs=[name],
          name=name
      )
      return [node]
docs: Map MXNet's argmax operator attributes to onnx's ArgMax operator
      and return the created node.