default boolean hasNewerGeneration(JRTServerConfigRequest request) {
        return (getGeneration() > request.getRequestGeneration());
    }
A config response encapsulates the payload and some meta information. This makes it possible to
represent the payload in different formats all up to when rendering it to the client. A subclass
of this must be thread safe, because a response may be cached and, the methods below should be callable
from multiple request handler threads.

@author Ulf Lilleengen
config/src/main/java/com/yahoo/vespa/config/protocol/ConfigResponse.java