text: // 20.1.2.5 Number.isSafeInteger(number)
  var $export = require('./$.export')
      , isInteger = require('./$.is-integer')
      , abs = Math.abs;
  
  $export($export.S, 'Number', {
      isSafeInteger: function isSafeInteger(number) {
          return isInteger(number) && abs(number) <= 0x1fffffffffffff;
      }
  });