code: def validation_workload(
      step_id: int = 1,
      exp_id: int = 1,
      trial_id: int = 1,
      total_batches_processed: int = 0,
  ) -> Workload:
      return Workload(
          Workload.Kind.COMPUTE_VALIDATION_METRICS,
          exp_id,
          trial_id,
          step_id,
          0,
          total_batches_processed,
      )
  
imports: import abc
  from enum import Enum, unique
  from typing import Any, Callable, Dict, Iterator, Optional, Tuple, Union, cast
  from determined.common import check
label_desc: Use image node_id 3 for calling a global function with example usage: validation_workload(step_id, exp_id, trial_id, total_batches_processed) and returns: Workload