code: function (specification, scope, callback) {
      var executeUndoSeed = load('undo-seed');
      if (arguments.length > 0) {
        if (typeof specification === 'number') {
          this.internals.argv.count = specification;
  
          if (scope) {
            this.internals.migrationMode = scope;
            this.internals.matching = scope;
          }
        } else if (typeof specification === 'string') {
          this.internals.migrationMode = scope;
          this.internals.matching = scope;
        }
      }
  
      return Promise.fromCallback(
        function (callback) {
          executeUndoSeed(this.internals, this.config, callback);
        }.bind(this)
      ).asCallback(callback);
    }
docs: Execute the down function of currently executed seeds.