@Test
public void testGetRawBlockHeader_Hash() throws Exception {

    neow3j.getRawBlockHeader("0x2240b34669038f82ac492150d391dfc3d7fe5e3c1d34e5b547d50e99c09b468d").send();
    verifyResult(
            "{\"jsonrpc\":\"2.0\",\"method\":\"getblockheader\","
                    + "\"params\":[\"0x2240b34669038f82ac492150d391dfc3d7fe5e3c1d34e5b547d50e99c09b468d\",0],\"id\":1}");
}