private ResponseAndHits getNextResponse(long timeLeftMs) throws InterruptedException {
        if (timeLeftMs <= 0) {
            return null;
        }
        var responseAndHits = responses.poll(timeLeftMs, TimeUnit.MILLISECONDS);
        if (responseAndHits == null || responseAndHits.response().timeout()) {
            return null;
        }
        return responseAndHits;
    }
Send a docsums request to a node. Responses will be added to the given receiver.
container-search/src/main/java/com/yahoo/search/dispatch/rpc/RpcProtobufFillInvoker.java