private void getConfigV3(Request req) {
        req.detach();
        rpcAuthorizer.authorizeConfigRequest(req)
                .thenRun(() -> addToRequestQueue(JRTServerConfigRequestV3.createFromRequest(req)));
    }
Handles RPC method "config.v3.getConfig" requests.
Uses the template pattern to call methods in classes that extend RpcServer.
configserver/src/main/java/com/yahoo/vespa/config/server/rpc/RpcServer.java