Version : 2.0.0-preview import org.apache.spark.ml.param._ import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
class CustomTransformer(override val uid: String) extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritableimport org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol} HasInputCol, HasOutputCol} *Error in IntelliJ * Symbol HasInputCol is inaccessible from this place similairly for HasOutputCol and DefaultParamsWritable Any thoughts on this error as it is not allowing the compile