static AggregatedHttpFile of(HttpData data) {
        return builder(data).build();
    }
Creates a new {@link AggregatedHttpFile} which streams the specified {@link HttpData}. This method is
a shortcut for {@code AggregatedHttpFile.of(data, System.currentTimeMillis()}.
core/src/main/java/com/linecorp/armeria/server/file/AggregatedHttpFile.java