code: def __len__(self):
      return len(self.inner_list)
  
file_path: Neuraxle/testing_neuraxle/test_data_container_batching.py
imports: import pytest
  from neuraxle.data_container import DACT, StripAbsentValues
  import numpy
label_desc: Use image node_id 4 for calling the SomeLazyLoadableCollection obj's underlying member method code with example usage: obj.__len__() and returns: len