@SuppressWarnings("unchecked")
        @Override
        public CompletableFuture<AggregatedHttpRequest> aggregate(AggregationOptions options) {
            return super.aggregate(options);
        }
An {@link HttpRequest} optimized for when all the {@link HttpObject}s that will be published are known at
construction time.
core/src/main/java/com/linecorp/armeria/common/FixedHttpRequest.java