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kotlinlang

Hi everyone! I created a PR <https://github.com/arrow-kt/arrow-core/pull/129> to add `filterIsInstance` and `traverseFilterIsInstance` but I have a problem
• `arrow-meta` cannot handle `java.lang.Class` correctly. It generates `import kotlin.Class` which doesn't exist! I tried to add `.replace("java.lang.Class", "")` in `fun String.asKotlin(): String` but it didn't solve the problem! Also in `fun TypeName.Classy.asKotlin(): TypeName.Classy` there is a condition for `Iterable` but didn't work with `Class`!
• Also I tried with `kotlin.reflect.KClass&lt;T : Any&gt;` but `arrow-meta` cannot handle the `T : Any` part!
Any suggestion to solve it?

I have a plan to fix it in another PR. IMHO the problem is where we separate the `simpleName` from the `packageName` and apply `asKotlin` method on each of them. They both must be deduced from canonical name and `asKotlin` just applies on canonical name(aka qualified name). If there's not any other suggestion, I'll start tonight.

This is the PR to solve it <https://github.com/arrow-kt/arrow-core/pull/130>