code: def check_extensions(module_name, module_path):
      
      option_name = '%s_extend' % module_name
      version = config.get('Boto', option_name, None)
      if version:
          dirname = module_path[0]
          path = os.path.join(dirname, version)
          if os.path.isdir(path):
              log.info('extending module %s with: %s' % (module_name, path))
              module_path.insert(0, path)
docs: This function checks for extensions to boto modules.  It should be called in the
      __init__.py file of all boto modules.  See:
      http://code.google.com/p/boto/wiki/ExtendModules
  
      for details.