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node_modules/core-js/internals/object-is-extensible.js

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+'use strict';
+var fails = require('../internals/fails');
+var isObject = require('../internals/is-object');
+var classof = require('../internals/classof-raw');
+var ARRAY_BUFFER_NON_EXTENSIBLE = require('../internals/array-buffer-non-extensible');
+
+// eslint-disable-next-line es/no-object-isextensible -- safe
+var $isExtensible = Object.isExtensible;
+var FAILS_ON_PRIMITIVES = fails(function () { $isExtensible(1); });
+
+// `Object.isExtensible` method
+// https://tc39.es/ecma262/#sec-object.isextensible
+module.exports = (FAILS_ON_PRIMITIVES || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
+  if (!isObject(it)) return false;
+  if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) === 'ArrayBuffer') return false;
+  return $isExtensible ? $isExtensible(it) : true;
+} : $isExtensible;