code: def _state_reduction(
      state: List[torch.Tensor], dim: int = 1
  ) -> List[torch.Tensor]:
      return [torch.cat(state, dim=dim)]
  
imports: from functools import partial
  from typing import Any, cast, Dict, List, Optional, Type
  import torch
  import torch.distributed
  from torchrec.metrics.metrics_config import RecComputeMode, RecTaskInfo
  from torchrec.metrics.metrics_namespace import MetricName, MetricNamespace, MetricPrefix
  from torchrec.metrics.rec_metric import MetricComputationReport, RecMetric, RecMetricComputation, RecMetricException
label_desc: Use image node_id 4 for calling a global function with example usage: _state_reduction(state, dim) and returns: list