code: def __call__(self, graph):
      x_sum = np.sum(graph.x, -1)
      x_sum[x_sum == 0] = 1
      graph.x = graph.x / x_sum[..., None]
  
      return graph
  
label_desc: Use image node_id 1 for calling the NormalizeOne obj's underlying member method code with example usage: obj.__call__(graph) and returns: graph