code: def all_gather_coalesced(
      output_tensors, input_tensors, group=None, async_op=False
  ):
      global cdb
      assert (
          cdb is not None and cdb.is_initialized()
      ), "DeepSpeed backend not set, please initialize it using init_process_group()"
      return cdb.all_gather_coalesced(
          output_tensors, input_tensors, group=group, async_op=async_op
      )
  
imports: import torch
  import os
  from ..constants import TORCH_DISTRIBUTED_DEFAULT_PORT, default_pg_timeout
  from .constants import *
  from .reduce_op import *
  from deepspeed.accelerator import get_accelerator
  from deepspeed.comm.ccl import CCLBackend
  from deepspeed.utils.comms_logging import CommsLogger
  from deepspeed.utils import timer, get_caller_func
  from deepspeed.comm.torch import TorchBackend
  from deepspeed import utils
  from datetime import timedelta
  from deepspeed.comm.utils import *
label_desc: Use image node_id 33 for calling a global function with example usage: all_gather_coalesced(output_tensors, input_tensors, group, async_op) and returns: cdb