public T send() throws IOException {
        return web3jService.send(this, responseType);
    }
@Test
    public void testEthGetTransactionByBlockHashAndIndex() throws Exception {
        web3j.ethGetTransactionByBlockHashAndIndex(
                        "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
                        BigInteger.ZERO)
                .send();

        verifyResult(
                "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionByBlockHashAndIndex\",\"params\":[\"0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331\",\"0x0\"],\"id\":1}");
    }