code: function defaultInsertDelayed (insertDelayed) {
      // set insertDelayed
      if (defined(insertDelayed)) {
          getGlobal().defaultInsertDelayed = !!insertDelayed
          // return class when setting
          return ImmutableCoreModel
      }
      // return insertDelayed
      return getGlobal().defaultInsertDelayed
  }
docs: @function defaultInsertDelayed
  
  get/set global default insert delayed setting for MyISAM tables
  
  @param {string|undefined} insertDelayed
  
  @returns {ImmutableCoreModel|string}