code: def __iter__(self):
      self.iterator = iter(self.loader)
      self.subiterator = None
      return self
  
imports: import numpy
  import torch
  from torch.utils.data import Dataset, IterableDataset
  from ..utils.generic import ModelOutput
label_desc: Use image node_id 2 for calling the PipelineChunkIterator obj's underlying member method code with example usage: obj.__iter__() and returns: self