code: public ApiResponse<List<MarketOrdersResponse>> getMarketsRegionIdOrdersWithHttpInfo(String orderType,
              Integer regionId, String datasource, String ifNoneMatch, Integer page, Integer typeId) throws ApiException {
          com.squareup.okhttp.Call call = getMarketsRegionIdOrdersValidateBeforeCall(orderType, regionId, datasource,
                  ifNoneMatch, page, typeId, null);
          Type localVarReturnType = new TypeToken<List<MarketOrdersResponse>>() {
          }.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: List orders in a region Return a list of orders in a region --- This
  route is cached for up to 300 seconds
  
  @param orderType
  Filter buy/sell orders, return all orders by default. If you
  query without type_id, we always return both buy and sell
  orders (required)
  @param regionId
  Return orders in this region (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param ifNoneMatch
  ETag from a previous request. A 304 will be returned if this
  matches the current ETag (optional)
  @param page
  Which page of results to return (optional, default to 1)
  @param typeId
  Return orders only for this type (optional)
  @return ApiResponse&lt;List&lt;MarketOrdersResponse&gt;&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body