Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/19588#discussion_r150719166
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala ---
@@ -311,22 +342,39 @@ class VectorIndexerModel private[ml] (
// TODO: Check more carefully about whether this whole class will be
included in a closure.
/** Per-vector transform function */
- private val transformFunc: Vector => Vector = {
+ private lazy val transformFunc: Vector => Vector = {
--- End diff --
Or we could change it to a def here in order to avoid methods-in-methods.
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