#vulnerable code 
                                @Override
    protected String getRawFormData(final String formName, final SlingHttpServletRequest request,
            final SlingHttpServletResponse response) {
        final String cookieName = getGetLookupKey(formName);
        final Cookie cookie = CookieUtil.getCookie(request, cookieName);

        if (response != null && cookie != null) {
            CookieUtil.dropCookies(request, response, ROOT_COOKIE_PATH, cookieName);
        } else {
            log.warn("SlingHttpServletResponse required for removing cookie. Please use formHelper.getForm({}, slingRequest, slingResponse);", formName);
        }
        // Get the QP lookup for this form
        return this.decode(cookie.getValue());
    } 
                            #location 13 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    protected String getRawFormData(final String formName, final SlingHttpServletRequest request,
            final SlingHttpServletResponse response) {
        final String cookieName = getGetLookupKey(formName);
        final Cookie cookie = CookieUtil.getCookie(request, cookieName);

        String data = "";
        if (response != null && cookie != null) {
            CookieUtil.dropCookies(request, response, ROOT_COOKIE_PATH, cookieName);
            // Get the QP lookup for this form
            data = this.decode(cookie.getValue());
        } else {
            log.warn("SlingHttpServletResponse required for removing cookie. Please use formHelper.getForm({}, slingRequest, slingResponse);", formName);
        }
        return data;
    }