docs: public com.squareup.okhttp.Call getMarketsRegionIdOrdersAsync(String orderType, Integer regionId,
              String datasource, String ifNoneMatch, Integer page, Integer typeId,
              final ApiCallback<List<MarketOrdersResponse>> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = getMarketsRegionIdOrdersValidateBeforeCall(orderType, regionId, datasource,
                  ifNoneMatch, page, typeId, callback);
          Type localVarReturnType = new TypeToken<List<MarketOrdersResponse>>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }