fromCurrency static method
Finds countries that use a specific currency.
currencyCode
- The 3-letter currency code (e.g., 'USD', 'EUR').
Returns a list of countries that use the specified currency.
Implementation
static List<Country> fromCurrency(String currencyCode) {
final countries = loadCountries();
return countries
.where((country) => country.currencies.any((currency) =>
currency.code.toUpperCase() == currencyCode.toUpperCase()))
.toList();
}