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  1. 'use strict';
  2. var origSymbol = typeof Symbol !== 'undefined' && Symbol;
  3. var hasSymbolSham = require('./shams');
  4. /** @type {import('.')} */
  5. module.exports = function hasNativeSymbols() {
  6. if (typeof origSymbol !== 'function') { return false; }
  7. if (typeof Symbol !== 'function') { return false; }
  8. if (typeof origSymbol('foo') !== 'symbol') { return false; }
  9. if (typeof Symbol('bar') !== 'symbol') { return false; }
  10. return hasSymbolSham();
  11. };