code: def _check_template(self, content):
      dist, cmd = self.get_cmd()
      os.chdir(self.tmp_dir)
      self.write_file("MANIFEST.in", content)
      cmd.ensure_finalized()
      cmd.filelist = FileList()
      cmd.read_template()
      warnings = self.get_logs(WARN)
      self.assertEqual(len(warnings), 1)
  
imports: import os
  import tarfile
  import unittest
  import warnings
  import zipfile
  from os.path import join
  from textwrap import dedent
  from test.test_support import captured_stdout, check_warnings, run_unittest
  from distutils.command.sdist import sdist, show_formats
  from distutils.core import Distribution
  from distutils.tests.test_config import PyPIRCCommandTestCase
  from distutils.errors import DistutilsOptionError
  from distutils.spawn import find_executable
  from distutils.log import WARN
  from distutils.filelist import FileList
  from distutils.archive_util import ARCHIVE_FORMATS
label_desc: Use image node_id 13 for calling the SDistTestCase obj's underlying member method code with example usage: obj._check_template(content) without return types