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node_modules/core-js/modules/es.symbol.key-for.js

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+'use strict';
+var $ = require('../internals/export');
+var hasOwn = require('../internals/has-own-property');
+var isSymbol = require('../internals/is-symbol');
+var tryToString = require('../internals/try-to-string');
+var shared = require('../internals/shared');
+var NATIVE_SYMBOL_REGISTRY = require('../internals/symbol-registry-detection');
+
+var SymbolToStringRegistry = shared('symbol-to-string-registry');
+
+// `Symbol.keyFor` method
+// https://tc39.es/ecma262/#sec-symbol.keyfor
+$({ target: 'Symbol', stat: true, forced: !NATIVE_SYMBOL_REGISTRY }, {
+  keyFor: function keyFor(sym) {
+    if (!isSymbol(sym)) throw TypeError(tryToString(sym) + ' is not a symbol');
+    if (hasOwn(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+  }
+});