kitchensink/examples/node_modules/setprototypeof/index.js

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module.exports = Object.setPrototypeOf || ({__proto__:[]} instanceof Array ? setProtoOf : mixinProperties);

function setProtoOf(obj, proto) {
	obj.__proto__ = proto;
}

function mixinProperties(obj, proto) {
	for (var prop in proto) {
		obj[prop] = proto[prop];
	}
}