code: def __next__(self):
      if len(self.batched_indices):
          batch_of_indices = self.batched_indices.pop(0)
          self.dispatch_tasks(batch_of_indices)
  
      if len(self.async_results_queue) == 0:
          raise StopIteration
      async_x = self.async_results_queue.pop(0)
  
      try:
          x = async_x.get(timeout=self.timeout)
      except KeyboardInterrupt:
          self.shutdown()
          raise
      batch = x
      return batch
  
imports: import multiprocessing.pool
  import os
  import typing
  import jax
  import jax.numpy
  import numpy
  from .data_adapter import DataAdapter
  from .utils import is_none_or_empty
label_desc: Use image node_id 3 for calling the MultiProcessIterator obj's underlying member method code with example usage: obj.__next__() and returns: batch