returning null from getResponse to avoid wrapping issue for tomcat 11

surf/spring-surf/spring-surf/src/main/java/org/springframework/extensions/surf/util/FakeHttpServletResponse.java

@@ -1,20 +1,20 @@
-/*
- * Copyright (C) 2005-2015 Alfresco Software Limited.
- *
- * This file is part of Alfresco
- *
- * Alfresco is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Alfresco is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+/*
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.springframework.extensions.surf.util;
@@ -35,7 +35,7 @@
 import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
-
+
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletResponse;
@@ -126,7 +126,17 @@ private void init()
             this.initialised = true;
         }
     }
-
+
+    /**
+     * (non-Javadoc)
+     * Intentionally returns {@code null} to avoid exposing the wrapped response.
+     * @see jakarta.servlet.ServletResponseWrapper#getResponse()
+     */
+    @Override
+    public HttpServletResponse getResponse() {
+        return null;
+    }
+
     /**
      * (non-Javadoc)
      * @see javax.servlet.ServletResponse#setCharacterEncoding(java.lang.String)