code: def library_option(self, lib):
      return "-l" + lib
  
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 4 for calling the FakeCompiler obj's underlying member method code with example usage: obj.library_option(lib) and returns: unknown