code: def library_dir_option(self, dir):
      return "-L" + dir
  
imports: import os
  import unittest
  from test.test_support import captured_stdout
  from distutils.ccompiler import gen_lib_options, CCompiler, get_default_compiler
  from distutils.sysconfig import customize_compiler
  from distutils import debug
  from distutils.tests import support
label_desc: Use image node_id 1 for calling the FakeCompiler obj's underlying member method code with example usage: obj.library_dir_option(dir) and returns: unknown