constructor() {
    /** @type {string} */ this.DECIMAL_SEP;  //
    /** @type {string} */ this.GROUP_SEP;    //
    /** @type {string} */ this.PERCENT;      //
    /** @type {string} */ this.ZERO_DIGIT;   //
    /** @type {string} */ this.PLUS_SIGN;
    /** @type {string} */ this.MINUS_SIGN;       //
    /** @type {string} */ this.EXP_SYMBOL;       //
    /** @type {string} */ this.PERMILL;          //
    /** @type {string} */ this.INFINITY;         //
    /** @type {string} */ this.NAN;              //
    /** @type {string} */ this.DECIMAL_PATTERN;  //
    /** @type {string} */ this.SCIENTIFIC_PATTERN;
    /** @type {string} */ this.PERCENT_PATTERN;  //
    /** @type {string} */ this.CURRENCY_PATTERN;
    /** @type {string} */ this.DEF_CURRENCY_CODE;
  }
Number formatting symbols for locale.
@record