code: def input_shape(self):
      return (4, 8, 32, 32)
  
imports: import copy
  import os
  import tempfile
  import unittest
  import numpy
  import torch
  from diffusers import MotionAdapter, UNet2DConditionModel, UNetMotionModel
  from diffusers.utils import logging
  from diffusers.utils.import_utils import is_xformers_available
  from diffusers.utils.testing_utils import enable_full_determinism, floats_tensor, torch_device
  from .test_modeling_common import ModelTesterMixin, UNetTesterMixin
label_desc: Use image node_id 2 for calling the UNetMotionModelTests obj's underlying member method code with example usage: obj.input_shape() and returns: int,  int,  int,  int