public HistoricalPriceWebRequestBuilder(YahooTickersUrlParameterBuilder tickers_parameter_builder,
                                         DateParameterBuilder date_parameter_builder,
                                         PeriodParameterBuilder period_parameter_builder)
 {
     this.tickers_parameter_builder = tickers_parameter_builder;
     this.date_parameter_builder = date_parameter_builder;
     this.period_parameter_builder = period_parameter_builder;
 }
 public HistoricalPriceWebRequestBuilder(YahooTickersUrlParameterBuilder tickers_parameter_builder,
                                         DateParameterBuilder date_parameter_builder,
                                         PeriodParameterBuilder period_parameter_builder)
 {
     this.tickers_parameter_builder = tickers_parameter_builder;
     this.date_parameter_builder    = date_parameter_builder;
     this.period_parameter_builder  = period_parameter_builder;
 }