object : TypeSafeMatcher<PlatformVersion>() {
        override fun describeTo(description: Description) {
          description.appendText("JDK with version from $version")
        }

        override fun matchesSafely(item: PlatformVersion): Boolean = item.majorVersion >= version
      }

    fun onMajor(version: Int): Matcher<PlatformVersion> =
      object : TypeSafeMatcher<PlatformVersion>() {