whole_func_string: function delay(ms) {
              return this.add(function (err, res, next) {
                  setTimeout(function () {
                      next(err, res);
                  }, ms || 0);
              });
          }
func_code_string: function delay(ms) {
              return this.add(function (err, res, next) {
                  setTimeout(function () {
                      next(err, res);
                  }, ms || 0);
              });
          }
func_documentation_string: msミリ秒だけ次の処理を遅延させます
  @memberof Bucks
  @instance
  @param {int} ms 遅延させる時間[ms] default) 0
  @return {Bucks}