@Override
    public Appender<ILoggingEvent> getAppender(String name) {
        return aai.getAppender(name);
    }
Stores the specified {@link RequestContextExporterBuilder} customizer to be lazily applied when
the exporter is built.
logback/logback12/src/main/java/com/linecorp/armeria/common/logback/RequestContextExportingAppender.java