Changes on code review

compiler/testData/diagnostics/tests/syntheticExtensions/samAdapters/InnerClassInGeneric.kt

@@ -1,20 +1,16 @@
 // FILE: KotlinFile.kt
-fun foo(javaClass: JavaClass<Int>) {
+fun foo(javaClass: JavaClass<Int>): Int {
     val inner = javaClass.createInner<String>()
-    inner.doSomething(1, "") {
-        bar()
-    }
+    return inner.doSomething(1, "") { }
 }
 
-fun bar(){}
-
 // FILE: JavaClass.java
 public class JavaClass<T> {
     public <X> Inner<X> createInner() {
         return new Inner<X>();
     }
 
-    public class Inner<X>{
-        public void doSomething(T t, X x, Runnable runnable) { runnable.run(); }
+    public interface Inner<X>{
+        public T doSomething(T t, X x, Runnable runnable);
     }
 }