<@U0D06TWMA> <@U0B8ZP13Q> When I write Kotlin, us...

# announcements

[ryotamurohoshi]

@Andreas Sinz @cedric
When I write Kotlin, usually I need to use Kotlin with Java.

How do you think platform type?
We know that there is Platform Type and it becomes reason of NullPointerException or IllegalStateException.