code: def main():
      p = Pipeline([MultiplyByN(multiply_by=2)])
  
      data_inputs = np.array([1, 2])
      generated_outputs = p.transform(data_inputs)
      regenerated_inputs = p.inverse_transform(generated_outputs)
  
      assert np.array_equal(regenerated_inputs, data_inputs)
      assert np.array_equal(generated_outputs, 2 * data_inputs)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types