docs: public static List<String> getDefaultConversionProviderChain(){
          List<String> defaultChain = getMonetaryConversionsSpi()
                  .getDefaultProviderChain();
          Objects.requireNonNull(defaultChain, "No default provider chain provided by SPI: " +
                  getMonetaryConversionsSpi().getClass().getName());
          return defaultChain;
      }