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