[GitHub] [spark] srowen opened a new pull request #24586: [SPARK-27682][CORE][GRAPHX][MLLIB] Replace use of collections and methods that will be removed in Scala 2.13 with work-alikes

[GitBox <gi...@apache.org>]

srowen opened a new pull request #24586: [SPARK-27682][CORE][GRAPHX][MLLIB] Replace use of collections and methods that will be removed in Scala 2.13 with work-alikes
URL: https://github.com/apache/spark/pull/24586
 
 
   ## What changes were proposed in this pull request?
   
   This replaces use of collection classes like `MutableList` and `ArrayStack` with workalikes that are available in 2.12, as they will be removed in 2.13. It also removes use of `.to[Collection]` as its uses was superfluous anyway. Removing `collection.breakOut` will have to wait until 2.13
   
   ## How was this patch tested?
   
   Existing tests

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