code: def add_plugin_filepaths(self, filepaths, except_blacklisted=True):
          
          self.file_manager.add_plugin_filepaths(filepaths,
                                                 except_blacklisted)
docs: Adds `filepaths` to internal state. Recommend passing
          in absolute filepaths. Method will attempt to convert to
          absolute paths if they are not already.
  
          `filepaths` can be a single object or an iterable
  
          If `except_blacklisted` is `True`, all `filepaths` that
          have been blacklisted will not be added.