IDEA-177895 Completion items with type casts derived from control flow are not suggested for 'this'

java/java-tests/testData/codeInsight/completion/normal/CastInstanceofedThisQualifier.java

@@ -0,0 +1,15 @@
+public abstract class Super {
+
+    void foo() {
+      if (this instanceof Sub) {
+        this.subme<caret>
+      }
+    }
+
+
+}
+
+class Sub extends Zzza {
+  void subMethod() {}
+
+}

java/java-tests/testData/codeInsight/completion/normal/CastInstanceofedThisQualifier_after.java

@@ -0,0 +1,15 @@
+public abstract class Super {
+
+    void foo() {
+      if (this instanceof Sub) {
+        ((Sub) this).subMethod();<caret>
+      }
+    }
+
+
+}
+
+class Sub extends Zzza {
+  void subMethod() {}
+
+}