JavaCompilerCore/resources/bytecode/javFiles/FunctionalInterface.jav

import java.lang.Integer;
import java.util.function.Function;

public class FunctionalInterface {
    Integer accept(Function<Integer, Integer> f) {
        return f.apply(20);
    }

    public Integer m() {
        var v = accept(i -> {
            return i * 10;
        });
        return v;
    }
}