public T send() throws IOException {
        return web3jService.send(this, responseType);
    }
@Test
    public void testWeb3Sha3() throws Exception {
        web3j.web3Sha3("0x68656c6c6f20776f726c64").send();

        verifyResult(
                "{\"jsonrpc\":\"2.0\",\"method\":\"web3_sha3\","
                        + "\"params\":[\"0x68656c6c6f20776f726c64\"],\"id\":1}");
    }