public T send() throws IOException {
        return web3jService.send(this, responseType);
    }
@Test
    public void testEthCall() throws Exception {
        web3j.ethCall(
                        Transaction.createEthCallTransaction(
                                "0xa70e8dd61c5d32be8058bb8eb970870f07233155",
                                "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
                                "0x0"),
                        DefaultBlockParameter.valueOf("latest"))
                .send();

        verifyResult(
                "{\"jsonrpc\":\"2.0\",\"method\":\"eth_call\","
                        + "\"params\":[{\"from\":\"0xa70e8dd61c5d32be8058bb8eb970870f07233155\","
                        + "\"to\":\"0xb60e8dd61c5d32be8058bb8eb970870f07233155\",\"data\":\"0x0\"},"
                        + "\"latest\"],\"id\":1}");
    }