code: def local_minibatch_size(self, new_local_minibatch_size) -> None:
      self._local_minibatch_size = new_local_minibatch_size
      self.local_minibatch_times_data_parallel_size = (
          self._local_minibatch_size * self.data_parallel_size
      )
  
imports: import abc
  import torch
label_desc: Use image node_id 5 for calling the MegatronPretrainingSampler obj's underlying member method code with example usage: obj.local_minibatch_size(new_local_minibatch_size) without return types