in src/main/java/org/apache/sling/feature/apiregions/model/io/json/ApiRegionsJSONSerializer.java [65:85]
    public static void serializeApiRegions(ApiRegions apiRegions, Writer writer) {
        requireNonNull(apiRegions, "Impossible to serialize null api-regions");
        requireNonNull(writer, "Impossible to serialize api-regions to a null stream");
        JsonGenerator generator = GENERATOR_FACTORY.createGenerator(writer)
                                                   .writeStartArray();
        for (ApiRegion apiRegion : apiRegions) {
            generator.writeStartObject()
                     .write(NAME_KEY, apiRegion.getName())
                     .writeStartArray(EXPORTS_KEY);
            for (String api : apiRegion.getExports()) {
                generator.write(api);
            }
            generator.writeEnd().writeEnd();
        }
        generator.writeEnd().close();
    }