object-is-extensible.js
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object-is-extensible.js
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	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;

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