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

java/java-tests/testData/refactoring/extractMethod/NotNullArgument7_after.java

@@ -0,0 +1,20 @@
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+class C {
+    void f(@Nullable Object o, boolean b) {
+        while (o != null) {
+            if (b) {
+                o = 7;
+            }
+            newMethod(o);
+        }
+    }
+
+    private void newMethod(@NotNull Object o) {
+        g(o);
+    }
+
+    void g(Object o) {
+    }
+}