Any way to solve this incompatibility issues of java and kotlin?

# multiplatform

[Joey]

Any way to solve this incompatibility issues of java and kotlin?

[altavir]

It is not incompatibility. It is wrong API usage. Read through error please.

[robstoll]

try getOnUserFetched().invoke()

[Dico]

I think your function is written as
fun getOnUserFetched() = {}
You should write it as fun getOnUserFetched(): Boolean {}

[Dico]

Could be at least