code: def test_dynamic_microbatch_calculator(self):
      self._test(rampup_batch_size=[256, 128, 500])
  
file_path: apex/tests/L0/run_transformer/test_microbatches.py
imports: import logging
  from typing import List, Optional
  from torch.testing._internal import common_utils
  from apex.transformer import parallel_state
  from apex.transformer.pipeline_parallel.utils import _reconfigure_microbatch_calculator, get_micro_batch_size, get_num_microbatches, get_current_global_batch_size, update_num_microbatches
  from apex.transformer.testing.distributed_test_base import NcclDistributedTestBase
  from apex.transformer.testing.distributed_test_base import UccDistributedTestBase
label_desc: Use image node_id 3 for calling the MicrobatchCalculatorTestBase obj's underlying member method code with example usage: obj.test_dynamic_microbatch_calculator() without return types