Spark Unary Transformer Example

I am trying to run the Unary Transformer example provided by Spark (https://github.com/apache/spark/blob/v3.1.2/examples/src/main/scala/org/apache/spark/examples/ml/UnaryTransformerExample.scala

RE: Re: [Spark ML Pipeline]: Error Loading Pipeline Model with Custom Transformer

I have updated the gist (https://gist.github.com/ally1221/5acddd9650de3dc67f6399a4687893aa ). Please let me know if there are any additional questions.

[Spark ML Pipeline]: Error Loading Pipeline Model with Custom Transformer

I am experimenting with creating and persisting ML pipelines using custom transformers (I am using Spark 3.1.2). I was able to create a transformer class (for testing purposes, I modeled the code off the SQLTransformer class) and save the pipeline model. When I attempt to load the saved