void sendResponse(final List<ConfigGroupEnum> changedGroups) {
            // cancel scheduler
            if (Objects.nonNull(asyncTimeoutFuture)) {
                asyncTimeoutFuture.cancel(false);
            }
            generateResponse((HttpServletResponse) asyncContext.getResponse(), changedGroups);
            asyncContext.complete();
        }
Send response.

@param changedGroups the changed groups
shenyu-admin/src/main/java/org/apache/shenyu/admin/listener/http/HttpLongPollingDataChangedListener.java