docs: def register_directory(self, dirpath, **kwargs):
          """
          Registers all of the files in the the directory path
          """
  
          kwargs['file_extensions'] = kwargs.get("file_extensions",
                                                 self.rdf_formats)
          files = list_files(file_directory=dirpath, **kwargs)
          for fileinfo in files:
              self.register_rml(fileinfo[-1], **kwargs)