'use strict'
/* eslint no-proto: 0 */
module.exports = Object.setPrototypeOf || ({ __proto__: [] } instanceof Array ? setProtoOf : mixinProperties)

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

function mixinProperties (obj, proto) {
 for (var prop in proto) {
 if (!obj.hasOwnProperty(prop)) {
  obj[prop] = proto[prop]
 }
 }
 return obj
}