Android Native Extensions can not use Kotlin file?

Questions
1

hello , i want to use kotlin source code to write android native extension , but now , when i create a.kt put in extension folder and run , the defold IDE tell me can not find symbol a. how can I use kotlin source code to write native extensions , Please help , Thanks.

2

We do not support Kotlin in native extensions. You can only use Java for now.

3

OK , Thanks.