public RequestContextExporterBuilder builtIn(BuiltInProperty property) {
        requireNonNull(property, "property");
        return builtIn(property, property.key);
    }
Adds the specified {@link BuiltInProperty} to the export list.
The {@link BuiltInProperty#key} will be used for the export key.
core/src/main/java/com/linecorp/armeria/common/logging/RequestContextExporterBuilder.java