Scala:private[packageName]类A(vals:Int)中的奇怪行为隐藏了类型A,但是s仍然可以从另一个包访问,为什么?

考虑这个代码:

package Example1 {

  package thePackage {

    // PRIVATE test class with PUBLIC field
    private[thePackage] class VisibilityTest(value: String, val valueVisible: Int ) 

    // WRAPPER
    class Wrapper {
      val visibilityTest = new VisibilityTest( "Value set by Wrapper object.", 43 )
    }

  }

  object Tester extends App {
    val wrapper = new thePackage.Wrapper()

//    val wrapped: thePackage.VisibilityTest = wrapper.visibilityTest; // compile ERROR

    val wrapped = wrapper.visibilityTest; // COMPILES FINE -> ????????

//    println(wrapped.value) // ERROR -> as it should be, since value's getter is private
    println( wrapped.valueVisible ) // no ERROR -> ?????????

  }

}

我有两个问题,怎么可能:

• println( wrapped.valueVisible ) val wrapped: thePackage.VisibilityTest = wrapper.visibilityTest;
• val wrapped = wrapper.visibilityTest 编译得很好但是 val wrapped: thePackage.VisibilityTest = ...