Java: Infer nullability annotations for extracted method's parameters (IDEA-150243)

java/java-tests/testData/refactoring/extractMethod/NotNullArgument2_after.java

@@ -0,0 +1,31 @@
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+class C {
+    void f() {
+        I i = new I() {
+            @Override
+            public void m(@Nullable Object o) {
+                if (o != null) {
+                    newMethod(o);
+                }
+            }
+        };
+    }
+
+    private void newMethod(@NotNull Object o) {
+        if (o instanceof String) {
+            o = 2;
+        } else {
+            System.out.println(o);
+        }
+        g(o);
+    }
+
+    void g(@NotNull Object o) {
+    }
+
+    interface I {
+        void m(Object o);
+    }
+}