IDEA-81079: surround with notnull checks on selection

java/java-tests/testData/codeInsight/generation/surroundWith/java/SurroundWithNotNullCheck.java

@@ -0,0 +1,10 @@
+
+class Test {
+  String foo() {
+    return null;
+  }
+  
+  void bar() {
+    <selection>foo()</selection>.toLowerCase()
+  }
+}

java/java-tests/testData/codeInsight/generation/surroundWith/java/SurroundWithNotNullCheck_after.java

@@ -0,0 +1,12 @@
+
+class Test {
+  String foo() {
+    return null;
+  }
+  
+  void bar() {
+      if (foo() != null) {
+          foo().toLowerCase()<caret>
+      }
+  }
+}