@UnstableApi
    public VirtualHostBuilder multipartRemovalStrategy(MultipartRemovalStrategy removalStrategy) {
        multipartRemovalStrategy = requireNonNull(removalStrategy, "removalStrategy");
        return this;
    }
Sets the {@link MultipartRemovalStrategy} that determines when to remove temporary files created
for multipart requests.
If not set, {@link MultipartRemovalStrategy#ON_RESPONSE_COMPLETION} is used by default.
core/src/main/java/com/linecorp/armeria/server/VirtualHostBuilder.java