// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)
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var has = require('./_has');
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var toObject = require('./_to-object');
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var IE_PROTO = require('./_shared-key')('IE_PROTO');
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var ObjectProto = Object.prototype;
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module.exports = Object.getPrototypeOf || function (O) {
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O = toObject(O);
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if (has(O, IE_PROTO)) return O[IE_PROTO];
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if (typeof O.constructor == 'function' && O instanceof O.constructor) {
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return O.constructor.prototype;
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} return O instanceof Object ? ObjectProto : null;
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};
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