code: def get_resource_listing(schema_dir, should_generate_resource_listing):
      
      listing_filename = os.path.join(schema_dir, API_DOCS_FILENAME)
      resource_listing = _load_resource_listing(listing_filename)
  
      if not should_generate_resource_listing:
          return resource_listing
      return generate_resource_listing(schema_dir, resource_listing)
docs: Return the resource listing document.
  
      :param schema_dir: the directory which contains swagger spec files
      :type  schema_dir: string
      :param should_generate_resource_listing: when True a resource listing will
          be generated from the list of *.json files in the schema_dir. Otherwise
          return the contents of the resource listing file
      :type should_generate_resource_listing: boolean
      :returns: the contents of a resource listing document