| 'use strict'; | 
|   | 
| var GetIntrinsic = require('get-intrinsic'); | 
|   | 
| var $TypeError = GetIntrinsic('%TypeError%'); | 
|   | 
| var callBound = require('call-bind/callBound'); | 
|   | 
| var $SymbolToString = callBound('Symbol.prototype.toString', true); | 
|   | 
| var Type = require('./Type'); | 
|   | 
| // https://ecma-international.org/ecma-262/6.0/#sec-symboldescriptivestring | 
|   | 
| module.exports = function SymbolDescriptiveString(sym) { | 
|     if (Type(sym) !== 'Symbol') { | 
|         throw new $TypeError('Assertion failed: `sym` must be a Symbol'); | 
|     } | 
|     return $SymbolToString(sym); | 
| }; |