@Override
            protected com.yahoo.jdisc.Request newRequest() {
                return new com.yahoo.jdisc.Request(parentRequest, requestUri);
            }
Convenience which returns the next piece of content from the response data of this as a string, or
null if there is no more data. The channel must always be consumed until there is no more data.
container-core/src/test/java/com/yahoo/processing/processors/MockUserDatabaseClient.java