diff --git a/src/main/java/com/acme/DemoController.java b/src/main/java/com/acme/DemoController.java
index 455436d..2de8c87 100644
--- a/src/main/java/com/acme/DemoController.java
+++ b/src/main/java/com/acme/DemoController.java
@@ -1,2 +1,9 @@
-// safe baseline
-public class DemoController {}
+import org.springframework.web.bind.annotation.*;
+@RestController
+public class DemoController {
+  @GetMapping("/items")
+  public String items(@RequestParam String sort) throws Exception {
+    Class<?> clazz = Class.forName(sort);
+    return "ok";
+  }
+}