code: def clear_preprocessor_outputs(self):
      for preprocessor in self.preprocessors:
          if not preprocessor.save_output:
              preprocessor.clear_outputs(self)
  
imports: import os
  import csv
  import numpy
  import tables
  import copy
  from tqdm import tqdm
  from deepneuro.augmentation.augment import Copy
  from deepneuro.utilities.conversion import read_image_files
  from deepneuro.data.data_group import DataGroup
  from deepneuro.data.data_load import parse_directories, parse_filepaths, parse_hdf5, parse_csv, parse_numpy
  from deepneuro.utilities.util import add_parameter
label_desc: Use image node_id 24 for calling the DataCollection obj's underlying member method code with example usage: obj.clear_preprocessor_outputs() without return types