The development team has always been very friendly and welcoming. I suspect that they didn't have time for someone who was interested in "arguing" with them.
I was not 'arguing with them' but when asked what was missing I offered deconstruction for nicely using Option/Maybe for which I was told there are non-nullable types. Rest see above.
I personally would listen instead of attacking me.
Since Kotlin can leverage JVM libraries, why not use Google Gauva? https://code.google.com/p/guava-libraries/wiki/UsingAndAvoid...