text: //§18.18.60 ST_PrintError (Print Errors)
  function items() {
      let opts = ['displayed', 'blank', 'dash', 'NA'];
      opts.forEach((o, i) => {
          this[o] = i + 1;
      });
  }
  
  
  items.prototype.validate = function (val) {
      if (this[val] === undefined) {
          let opts = [];
          for (let name in this) {
              if (this.hasOwnProperty(name)) {
                  opts.push(name);
              }
          }
          throw new TypeError('Invalid value for pageSetup.errors; Value must be one of ' + opts.join(', '));
      } else {
          return true;
      }
  };
  
  module.exports = new items();