code: def _CreateConfig(self, project_id):
      
      project_id = project_id or self._GetNumericProjectId()
  
      # Our project doesn't support service accounts.
      if not project_id:
        return
  
      self.boto_config_header %= (
          self.boto_config_script, self.boto_config_template)
      config = config_manager.ConfigManager(
          config_file=self.boto_config_template,
          config_header=self.boto_config_header)
      boto_dir = os.path.dirname(self.boto_config_script)
  
      config.SetOption('GSUtil', 'default_project_id', project_id)
      config.SetOption('GSUtil', 'default_api_version', '2')
      config.SetOption('GoogleCompute', 'service_account', 'default')
      config.SetOption('Plugin', 'plugin_directory', boto_dir)
      config.WriteConfig(config_file=self.boto_config)
docs: Create the boto config to support standalone GSUtil.
  
      Args:
        project_id: string, the project ID to use in the config file.