class JsonRpc2_0Rx {

    public Observable<EthBlock> catchUpToLatestAndSubscribeToNewBlocksObservable(
            DefaultBlockParameter startBlock, boolean fullTransactionObjects,
            long pollingInterval) {

        return catchUpToLatestBlockObservable(
                startBlock, fullTransactionObjects,
                blockObservable(fullTransactionObjects, pollingInterval));
    }

    public  JsonRpc2_0Rx(Web3j web3j, ScheduledExecutorService scheduledExecutorService);

}