code: def _RunScripts(self, run_dir=None):
      
      with _CreateTempDir(self.script_type, run_dir=run_dir) as dest_dir:
        try:
          self.logger.info('Starting %s scripts.', self.script_type)
          script_dict = self.retriever.GetScripts(dest_dir)
          self.executor.RunScripts(script_dict)
        finally:
          self.logger.info('Finished running %s scripts.', self.script_type)
docs: Retrieve metadata scripts and execute them.
  
      Args:
        run_dir: string, the base directory location of the temporary directory.