code: def test_timestep_spacing(self):
      for timestep_spacing in ["trailing", "leading"]:
          self.check_over_configs(timestep_spacing=timestep_spacing)
  
imports: import torch
  from diffusers import DDIMInverseScheduler
  from .test_schedulers import SchedulerCommonTest
label_desc: Use image node_id 9 for calling the DDIMInverseSchedulerTest obj's underlying member method code with example usage: obj.test_timestep_spacing() without return types