private static boolean isFromNode(final Application fromApplication, final Application toApplication) {
        if (fromApplication.getServiceType().isRpcClient()) {
            return false;
        }
        return true;
    }
@author HyunGil Jeong
@author jaehong.kim
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/nodes/NodeListFactory.java