code: def pre_sub_module_backward_function(self, sub_module):
      assert (
          sub_module.training
      ), "backward pass is invalid for module in evaluation mode"
      param_coordinator = self.get_param_coordinator(training=True)
      param_coordinator.trace_prologue(sub_module)
      if param_coordinator.is_record_trace():
          param_coordinator.record_module(sub_module)
      param_coordinator.fetch_sub_module(sub_module, forward=False)
  
imports: import sys
  import torch
  from collections import OrderedDict
  from deepspeed.runtime.utils import see_memory_usage
  from deepspeed.runtime.zero.offload_config import OffloadDeviceEnum
  from deepspeed.runtime.zero.partition_parameters import _init_external_params
  from deepspeed.runtime.zero.partition_parameters import *
  from deepspeed.runtime.zero.partitioned_param_coordinator import PartitionedParameterCoordinator, InflightParamRegistry, iter_params
  from deepspeed import comm
  from deepspeed.accelerator import get_accelerator
label_desc: Use image node_id 13 for calling the DeepSpeedZeRoOffload obj's underlying member method code with example usage: obj.pre_sub_module_backward_function(sub_module) without return types