@Override
            public void logRequest(RequestOnlyLog log) {
                try {
                    LogWriter.this.logRequest(log);
                } finally {
                    after.logRequest(log);
                }
            }
Returns a new {@link LogWriter} which combines two {@link LogWriter}s.
core/src/main/java/com/linecorp/armeria/common/logging/LogWriter.java