code: def _make_headers(self):
      libraries = self._df.columns.to_list()
      columns = []
      for library in libraries:
          version = self._package_versions[library]
          library_description = self._libraries_description.get(library)
          if library_description:
              library += " {}".format(library_description)
  
          columns.append(
              "{library}<br><small>{version}</small>".format(
                  library=library, version=version
              )
          )
      return [""] + columns
  
imports: from PIL import Image
  import cv2
  import argparse
  import os
  import pkg_resources
  import sys
  import math
  import numpy
  from augbench.constants import DEFAULT_BENCHMARKING_LIBRARIES
  from pytablewriter import MarkdownTableWriter
  from pytablewriter.style import Style
label_desc: Use image node_id 3 for calling the MarkdownGenerator obj's underlying member method code with example usage: obj._make_headers() and returns: unknown