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'use strict';
var global = require('es5-ext/global')
, polyfill = require('../polyfill');
module.exports = function (t, a) {
var cache;
a(typeof t(), 'boolean');
cache = global.Symbol;
global.Symbol = polyfill;
a(t(), true);
if (cache === undefined) delete global.Symbol;
else global.Symbol = cache;
};
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