code: def test_unique_timesteps(self, **config):
      for scheduler_class in self.scheduler_classes:
          scheduler_config = self.get_scheduler_config(**config)
          scheduler = scheduler_class(**scheduler_config)
  
          scheduler.set_timesteps(scheduler.config.num_train_timesteps)
          assert (
              len(scheduler.timesteps.unique())
              == scheduler.num_inference_steps
          )
  
imports: import tempfile
  import torch
  from diffusers import DPMSolverMultistepInverseScheduler, DPMSolverMultistepScheduler
  from .test_schedulers import SchedulerCommonTest
label_desc: Use image node_id 22 for calling the DPMSolverMultistepSchedulerTest obj's underlying member method code with example usage: obj.test_unique_timesteps() without return types