docs: def remove_blacklisted_directories(self, directories):
          """
          Attempts to remove the `directories` from the set of blacklisted
          directories. If a particular directory is not found in the set of
          blacklisted, method will continue on silently.
  
          `directories` may be a single instance or an iterable. Recommend
          passing in absolute paths. Method will try to convert to an absolute
          path if it is not already using the current working directory.
          """
          directories = util.to_absolute_paths(directories)
          black_dirs = self.blacklisted_directories
          black_dirs = util.remove_from_set(black_dirs, directories)