Intellij format java functional interfaces in one line

I would like to write my code like this:

public class Test {

    class A {}

    class B {}

    interface ABMapper { B map(A a);}

    B map(A a, ABMapper mapper) {return mapper.map(a);}

    @org.junit.jupiter.api.Test
    public void test() {
        map(new A(), (a) -> new B());
    }
}

But when I format it in Intellij it expands the interface definition. I am able to configure it to keep simple methods in one line, but not interfaces. Does anyone know a way to do that?

I try to achieve a level of readability similar to Kotlin in which I can use typealias to declare in a single line the type of a lambda.

class A
class B
typealias ABMapper = (A) -> B
fun map (a: A, mapper: ABMapper): B = mapper(a)
fun main() {
    map(A(), {_ -> B()})
}