sbt中的mapR有什么作用？

Question

我的sbt文件中有以下代码需要更改，但是我不了解mapR函数，它等于map吗？ 如果我在map case语句中有内容，该如何更改？ 这是我的代码：

test := ((test, testCleanup) mapR { 
        case (Inc(fail: Incomplete), Value(cleanup)) =>
          cleanup()
          throw Incomplete(None, message = Some("tests failed"), causes = Seq(fail))
        case (_, Value(cleanup)) =>
          cleanup()
        case _ =>
          sys error "test cleanup impossible"
    }

执行sbt时，出现以下警告：

method t2ToTable2 in object Scoped is deprecated: The sbt 0.10 style DSL is deprecated: '(k1, k2) map { (x, y) => ... }' should now be '{ val x = k1.value; val y = k2.value }'.
[warn] See http://www.scala-sbt.org/0.13/docs/Migrating-from-sbt-012x.html
[warn]       test := { ((test, testCleanup) mapR {