add exception to throws: find functional interface method for method references; discard if in library (IDEA-134468)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToThrows/afterMethodReference.java

@@ -0,0 +1,14 @@
+// "Add exception to method signature" "true"
+class C {
+  public static void main(String[] args){
+    I i = C::foo;
+  }
+
+  class Ex extends Exception {}
+
+  static void foo() throws Ex {}
+
+  interface I {
+    void f() throws Ex;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addToThrows/beforeMethodReference.java

@@ -0,0 +1,14 @@
+// "Add exception to method signature" "true"
+class C {
+  public static void main(String[] args){
+    I i = C::f<caret>oo;
+  }
+
+  class Ex extends Exception {}
+
+  static void foo() throws Ex {}
+
+  interface I {
+    void f();
+  }
+}