changes

src/main/java/ai/giskard/learnspringwebsockets/LearnSpringWebsocketsApplication.java

@@ -11,11 +11,8 @@ import org.springframework.stereotype.Component;
 import org.springframework.web.filter.OncePerRequestFilter;
 
 import java.io.IOException;
-import java.text.MessageFormat;
 import java.util.Collections;
 import java.util.Enumeration;
-import java.util.List;
-import java.util.StringTokenizer;
 
 @SpringBootApplication
 public class LearnSpringWebsocketsApplication {
@@ -26,7 +23,7 @@ public class LearnSpringWebsocketsApplication {
 
 
     @Component
-    class RequestWrapperFilter extends OncePerRequestFilter {
+    static class RequestWrapperFilter extends OncePerRequestFilter {
         @Override
         protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
                 throws ServletException, IOException {