public T send() throws IOException {
        return web3jService.send(this, responseType);
    }
@Test
    public void testEthGetLogs() throws Exception {
        web3j.ethGetLogs(
                        new EthFilter()
                                .addSingleTopic(
                                        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"))
                .send();

        verifyResult(
                "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getLogs\","
                        + "\"params\":[{\"topics\":["
                        + "\"0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b\"]}],"
                        + "\"id\":1}");
    }