NumberSymbols constructor
      const
      NumberSymbols({ 
    
    
- required String NAME,
 - required String DECIMAL_SEP,
 - required String GROUP_SEP,
 - required String PERCENT,
 - required String ZERO_DIGIT,
 - required String PLUS_SIGN,
 - required String MINUS_SIGN,
 - required String EXP_SYMBOL,
 - required String PERMILL,
 - required String INFINITY,
 - required String NAN,
 - required String DECIMAL_PATTERN,
 - required String SCIENTIFIC_PATTERN,
 - required String PERCENT_PATTERN,
 - required String CURRENCY_PATTERN,
 - required String DEF_CURRENCY_CODE,
 
Implementation
const NumberSymbols(
    {required this.NAME,
    required this.DECIMAL_SEP,
    required this.GROUP_SEP,
    required this.PERCENT,
    required this.ZERO_DIGIT,
    required this.PLUS_SIGN,
    required this.MINUS_SIGN,
    required this.EXP_SYMBOL,
    required this.PERMILL,
    required this.INFINITY,
    required this.NAN,
    required this.DECIMAL_PATTERN,
    required this.SCIENTIFIC_PATTERN,
    required this.PERCENT_PATTERN,
    required this.CURRENCY_PATTERN,
    required this.DEF_CURRENCY_CODE});