code: def get_extra_test_plugins():
      from .plugins.performgc import PerformGC
      from .plugins.knownfailure import KnownFailure
      from nose.plugins import attrib
  
      return [PerformGC, KnownFailure, attrib.Plugin]
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: get_extra_test_plugins() and returns: list