code: def test_codingspec(self):
      try:
          for enc in ALL_CJKENCODINGS:
              code = "# coding: {}\n".format(enc)
              exec(code)
      finally:
          os_helper.unlink(TESTFN)
  
imports: import _multibytecodec
  import codecs
  import io
  import sys
  import textwrap
  import unittest
  from test import support
  from test.support import os_helper
  from test.support.os_helper import TESTFN
label_desc: Use image node_id 5 for calling the Test_MultibyteCodec obj's underlying member method code with example usage: obj.test_codingspec() without return types