public static void logRequest(JsonRpcClient client, List<JsonRpcResponse> responses) {
   L.println(client.getFullExchangeString());
   if (responses != null) {
     for (JsonRpcResponse response : responses) L.println(response.toJSONString(4));
   }
 }
 public static void logRequest(JsonRpcClient client, JsonRpcResponse response) {
   L.println(client.getFullExchangeString());
   if (response != null) {
     L.println(response.toJSONString(4));
   }
 }