code: public static FastMoney of(Number number, String currencyCode) {
          CurrencyUnit currency = Monetary.getCurrency(currencyCode);
          return of(number, currency);
      }
docs: Static factory method for creating a new instance of {@link FastMoney}.
  
  @param currencyCode The target currency as currency code.
  @param number       The numeric part, not null.
  @return A new instance of {@link FastMoney}.