fun expr search: minor improvements after reviews

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/findUsages/FindSubInterfaceLambdas.java

@@ -18,9 +18,24 @@ class Foo {
     DumbAwareRunnable var1 = () -> "var1";
     DumbAwareRunnable2 var2 = () -> "var2";
     DumbAwareFunction var3 = a -> "var3";
+    WithDefaultMethods var4 = () -> "var4";
 
     foo(() -> "c1", DumbAwareRunnable2.class);
     bar(() -> "c2");
     bar2(() -> "c3");
   }
+}
+
+interface WithManyMethods {
+  void run1();
+  void run2();
+  void run3();
+}
+interface WithManyMethods2 extends WithManyMethods {
+}
+
+interface WithDefaultMethods extends WithManyMethods2 {
+  default String foo() {}
+  default void run1();
+  default void run2();
 }