[ml] Why all model classes are final?

[Peter Rudenko]

Hi, previously all the models in ml package were private to package, so 
if i need to customize some models i inherit them in org.apache.spark.ml 
package in my project. But now new models 
(https://github.com/apache/spark/blob/master/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala#L46) 
are final classes. So if i need to customize 1 line or so, i need to 
redefine the whole class. Any reasons to do so? As a developer,i 
understand all the risks of using Developer/Alpha API. That's why i'm 
using spark, because it provides a building blocks that i could easily 
customize and combine for my need.

Thanks,
Peter Rudenko
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@spark.apache.org
For additional commands, e-mail: dev-h...@spark.apache.org