code: def test_can_set_not_trainable_then_trainable_again() -> None:
      module = _module()
      set_trainable(module, False)
      set_trainable(module, True)
      assert len(module.trainable_variables) == len(module.variables)
  
imports: import tensorflow
  from gpflow import Parameter, set_trainable
label_desc: Use image node_id 3 for calling a global function with example usage: test_can_set_not_trainable_then_trainable_again() without return types