public Top3Currencies(CurrencyDataSource currencyDataSource, Currency baseCurrency)
     : base("Top3Currencies", currencyDataSource, baseCurrency) { }
 public Bottom3Currencies(CurrencyDataSource currencyDataSource, Currency baseCurrency)
     : base("Bottom3Currencies", currencyDataSource, baseCurrency) { }
 public CurrencyNameSource(string sourceName, CurrencyDataSource currencyDataSource, Currency baseCurrency)
 {
     _currencyDataSource = currencyDataSource;
     BaseCurrency = baseCurrency;
     SourceName = sourceName;
 }