Vector is not found in case class after import

[Yan Facai]

 Hi,
My spark-shell version is 2.0.1.

I import the Vector and hope to use it in case class, while spark-shell
throws an error: not found.

scala> import org.apache.spark.ml.linalg.{Vector => OldVector}
import org.apache.spark.ml.linalg.{Vector=>OldVector}

scala> case class Movie(vec: OldVector)
<console>:11: error: not found: type OldVector
       case class Movie(vec: OldVector)
                             ^

Is it a bug?