code: def add_dirrecord(self, rec):
          # type: (Union[dr.DirectoryRecord, udfmod.UDFFileEntry]) -> None
          '''
          A method to set the Directory Record associated with this Boot Catalog.
  
          Parameters:
           rec - The DirectoryRecord object to associate with this Boot Catalog.
          Returns:
           Nothing.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('El Torito Boot Catalog not yet initialized')
  
          self.dirrecords.append(recf add_dirrecord(self, rec):
          # type: (Union[dr.DirectoryRecord, udfmod.UDFFileEntry]) -> None
          '''
          A method to set the Directory Record associated with this Boot Catalog.
  
          Parameters:
           rec - The DirectoryRecord object to associate with this Boot Catalog.
          Returns:
           Nothing.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('El Torito Boot Catalog not yet initialized')
  
          self.dirrecords.append(rec)
docs: A method to set the Directory Record associated with this Boot Catalog.
  
          Parameters:
           rec - The DirectoryRecord object to associate with this Boot Catalog.
          Returns:
           Nothing.