code: def useful_chunk_section(self, start_of_doc, end_of_doc):
      start = self.normal_start
      end = self.normal_end
      if start_of_doc:
          start = 0
      if end_of_doc:
          end = self.max_length
      return start, end
  
file_path: finetune/finetune/util/input_utils.py
imports: import math
  import tensorflow
  from finetune.util.timing import ProgressBar
label_desc: Use image node_id 3 for calling the Chunker obj's underlying member method code with example usage: obj.useful_chunk_section(start_of_doc, end_of_doc) and returns: start,  end