public ExportGroupBuilder builtIn(BuiltInProperty property, String alias) {
        requireNonNull(property, "BuiltInProperty");
        requireNonNull(alias, "alias");
        builtIns.add(new ExportEntry<>(property, alias));
        return this;
    }
Adds the specified {@link BuiltInProperty} to the export list.
The specified {@code alias} will be used for the export key.
core/src/main/java/com/linecorp/armeria/common/logging/ExportGroupBuilder.java