code: def __call__(self, graph):
      offset = np.mean(graph.x, -2, keepdims=True)
      scale = np.abs(graph.x).max()
      graph.x = (graph.x - offset) / scale
  
      return graph
  
label_desc: Use image node_id 1 for calling the NormalizeSphere obj's underlying member method code with example usage: obj.__call__(graph) and returns: graph