@Override
        public ContentChannel handleResponse(Response response) {
            this.response = response;
            latch.countDown();

            buffer.connectTo(this.content);
            return buffer;
        }
Consumes all <i>currently</i> available data, or returns "" if no data is available right now. Never blocks.
container-core/src/main/java/com/yahoo/container/jdisc/RequestHandlerTestDriver.java