private ExportEntry<T> withPrefix(String exportPrefix) {
            checkArgument(!exportPrefix.isEmpty(), "exportPrefix must not be empty");

            if (stringifier == null) {
                return new ExportEntry<>(key, exportPrefix + exportKey);
            } else {
                return new ExportEntry<>(key, exportPrefix + exportKey, stringifier);
            }
        }
Adds the property represented by the specified key pattern to the export list. Please refer to the
<a href="https://armeria.dev/docs/advanced-logging">Logging contextual information</a>
in order to learn how to specify a key pattern.
core/src/main/java/com/linecorp/armeria/common/logging/ExportGroupBuilder.java