code: def dump(self):
          
          dumpfile = self.args.dumpfile
          if not dumpfile:
              db, env = self.get_db_args_env()
              dumpfile = fileutils.timestamp_filename(
                  'omero-database-%s' % db['name'], 'pgdump')
  
          log.info('Dumping database to %s', dumpfile)
          if not self.args.dry_run:
              self.pgdump('-Fc', '-f', dumpfile)
docs: Dump the database using the postgres custom format