code: def dummy_model(self):
      def model(sample, t, *args):
          return sample * t / (t + 1)
  
      return model
  
imports: import inspect
  import tempfile
  import unittest
  from typing import Dict, List, Tuple
  from diffusers import FlaxDDIMScheduler, FlaxDDPMScheduler, FlaxPNDMScheduler
  from diffusers.utils import is_flax_available
  from diffusers.utils.testing_utils import require_flax
label_desc: Use image node_id 4 for calling the FlaxSchedulerCommonTest obj's underlying member method code with example usage: obj.dummy_model() and returns: model, unknown