code: def _flat_all_gather_with_coalescing_manager(
      self, params, params_buffers=None
  ):
      """"""
      # must have to change the status of the param
      # and ensure they are on the device
      params, params_buffers = self._pre_all_gather(
          params, params_buffers
      )
  
      mics_comm_groups: MiCS_CommGroups = params[0].comm
      param_shard_size = mics_comm_groups.param_shard_size
  
      output_tensors = []
      input_tensors = []
      for i, p in enumerate(params):
          t_size = p.ds_tensor.ds_numel * param_shard_size
          if (
              params_buffers is not None
              and params_buffers[i] is not None
          ):
              assert (
                  params_buffers[i].numel() == t_size
              ), f"params_to_gather_buffers[{i}] size {params_buffers[i].numel()} does not match with t_size {t_size}"
              flat_out = params_buffers[i]
          else:
              flat_out = torch.empty(
                  t_size,
                  dtype=p.dtype,
                  device=self.local_device,
                  requires_grad=False,
              ).view(-1)
          output_tensors.append(flat_out)
          _flat_input = p.ds_tensor.data.view(-1)
          input_tensors.append(_flat_input)
  
      all_gather_handle = dist.all_gather_coalesced(
          output_tensors,
          input_tensors,
          group=mics_comm_groups.param_shard_group,
          async_op=True,
      )
  
      for idx, param in enumerate(params):
          param.data = (
              output_tensors[idx]
              .narrow(0, 0, param.ds_numel)
              .view(param.ds_shape)
              .data
          )
  
      return MiCS_AllGatherCoalescedHandle(
          allgather_handle=all_gather_handle,
          params=params,
          partitions=[],
          world_size=param_shard_size,
      )
  
imports: import sys
  from typing import List
  import deepspeed
  import torch
  from deepspeed import comm
  from deepspeed.runtime.zero.mics_utils import MiCS_CommGroups, create_mics_comm_groups, scale_tensors
  from deepspeed.runtime.zero.parameter_offload import DeepSpeedZeRoOffload, is_zero_param
  from deepspeed.runtime.zero.partition_parameters import Init, AllGatherCoalescedHandle, ZeroParamStatus
  from deepspeed.runtime.zero.stage3 import DeepSpeedZeroOptimizer_Stage3
  from deepspeed.utils import instrument_w_nvtx, log_dist
  from deepspeed.accelerator import get_accelerator
  from torch import Tensor
  from torch.nn import Parameter
label_desc: Use image node_id 4 for calling the MiCS_Init obj's underlying member method code with example usage: obj._flat_all_gather_with_coalescing_manager(params, params_buffers) and returns: MiCS_AllGatherCoalescedHandle