lambda: functional interface can contain multiple default methods

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/highlighting/DefaultMethod.java

@@ -0,0 +1,17 @@
+class Test {
+  public static final BinaryOperator<Integer> rPlus = (x, y) -> x + y;
+  interface BinaryOperator<T> extends Combiner<T,T,T> {
+    public T operate(T left, T right);
+
+    @Override
+    T combine(T t1, T t2) default {
+      return operate(t1, t2);
+    }
+  }
+
+  interface Combiner<T, U, V> {
+    V combine(T t, U u);
+  }
+}
+
+