code: def output_shape(self):
      return (3, 32, 32)
  
imports: import gc
  import math
  import unittest
  import torch
  from diffusers import UNet2DModel
  from diffusers.utils import logging
  from diffusers.utils.testing_utils import enable_full_determinism, floats_tensor, slow, torch_all_close, torch_device
  from .test_modeling_common import ModelTesterMixin, UNetTesterMixin
label_desc: Use image node_id 3 for calling the NCSNppModelTests obj's underlying member method code with example usage: obj.output_shape() and returns: int,  int,  int