code: def close_output(self):
      for key, open_file in self.open_files:
          open_file.close()
  
      self.open_files = defaultdict(lambda: None)
  
imports: import os
  import csv
  import numpy
  from collections import defaultdict
  from deepneuro.utilities.conversion import save_data
  from deepneuro.utilities.util import add_parameter, replace_suffix, nifti_splitext, additional_kwargs
  from deepneuro.utilities.visualize import check_data
label_desc: Use image node_id 11 for calling the Output obj's underlying member method code with example usage: obj.close_output() without return types