private void getConfigV3(Request req) {
        dispatchRpcRequest(req, () -> {
            JRTServerConfigRequest request = JRTServerConfigRequestV3.createFromRequest(req);
            req.target().addWatcher(this);
            getConfigImpl(request);
        });
    }
Handles RPC method "config.v3.getConfig" requests.

@param req a Request
config-proxy/src/main/java/com/yahoo/vespa/config/proxy/ConfigProxyRpcServer.java