code: def _manifest_is_not_generated(self):
      # check for special comment used in 3.1.3 and higher
      if not os.path.isfile(self.manifest):
          return False
  
      fp = open(self.manifest)
      try:
          first_line = fp.readline()
      finally:
          fp.close()
      return (
          first_line != "# file GENERATED by distutils, do NOT edit\n"
      )
  
imports: import os
  import sys
  from glob import glob
  from warnings import warn
  from ..core import Command
  from distutils import dir_util
  from distutils import file_util
  from distutils import archive_util
  from ..text_file import TextFile
  from ..filelist import FileList
  from distutils._log import log
  from ..util import convert_path
  from ..errors import DistutilsOptionError, DistutilsTemplateError
label_desc: Use image node_id 19 for calling the sdist obj's underlying member method code with example usage: obj._manifest_is_not_generated() and returns: unknown, False