code: def test_callback_inputs(self):
      pass
  
imports: import unittest
  import numpy
  import torch
  from transformers import CLIPTextConfig, CLIPTextModel, CLIPTokenizer
  from diffusers import DDPMWuerstchenScheduler, WuerstchenCombinedPipeline
  from diffusers.pipelines.wuerstchen import PaellaVQModel, WuerstchenDiffNeXt, WuerstchenPrior
  from diffusers.utils.testing_utils import enable_full_determinism, require_torch_gpu, torch_device
  from ..test_pipelines_common import PipelineTesterMixin
label_desc: Use image node_id 14 for calling the WuerstchenCombinedPipelineFastTests obj's underlying member method code with example usage: obj.test_callback_inputs() without return types