code: def _build_extensions_serial(self):
      for ext in self.extensions:
          with self._filter_build_errors(ext):
              self.build_extension(ext)
  
imports: import contextlib
  import os
  import re
  import sys
  from distutils.core import Command
  from distutils.errors import *
  from distutils.sysconfig import customize_compiler, get_python_version
  from distutils.sysconfig import get_config_h_filename
  from distutils.dep_util import newer_group
  from distutils.extension import Extension
  from distutils.util import get_platform
  from distutils import log
  from site import USER_BASE
label_desc: Use image node_id 9 for calling the build_ext obj's underlying member method code with example usage: obj._build_extensions_serial() without return types