code: def convert_roipooling(node, **kwargs):
      
      name, input_nodes, attrs = get_inputs(node, kwargs)
  
      pooled_shape = convert_string_to_list(attrs.get('pooled_size'))
      scale = float(attrs.get("spatial_scale"))
  
      node = onnx.helper.make_node(
          'MaxRoiPool',
          input_nodes,
          [name],
          pooled_shape=pooled_shape,
          spatial_scale=scale,
          name=name
      )
      return [node]
docs: Map MXNet's ROIPooling operator attributes to onnx's MaxRoiPool
      operator and return the created node.