Given that the body is a Flux<DataBuffer> there probably could be a Flux<DataBuffer> body(); At least bodyToFlux(DataBuffer.class) which is used when mutating and is a common case should not incur overhead. See gh-24680
Given that the body is a Flux<DataBuffer> there probably could be a Flux<DataBuffer> body(); At least bodyToFlux(DataBuffer.class) which is used when mutating and is a common case should not incur overhead. See gh-24680