public T send() throws IOException {
        return web3jService.send(this, responseType);
    }
@Test
    public void testEthProtocolVersion() throws Exception {
        web3j.ethProtocolVersion().send();

        verifyResult(
                "{\"jsonrpc\":\"2.0\",\"method\":\"eth_protocolVersion\",\"params\":[],\"id\":1}");
    }