prefer local variables over NULL_PSI_ELEMENT in smart completion

java/java-tests/testData/codeInsight/completion/smartTypeSorting/PreferExpectedLocalOverExactlyDefaultMember.java

@@ -0,0 +1,14 @@
+class Usage {
+  void foo(PsiMethod method) {
+    PsiUtil.ensureValid(<caret>);
+  }
+}
+
+class PsiUtil {
+  static final PsiElement NULL_PSI_ELEMENT;
+
+  static void ensureValid(PsiElement e) {}
+}
+
+interface PsiElement {}
+interface PsiMethod extends PsiElement {}