--- /dev/null
+var isObject = require('./_is-object')
+ , setPrototypeOf = require('./_set-proto').set;
+module.exports = function(that, target, C){
+ var P, S = target.constructor;
+ if(S !== C && typeof S == 'function' && (P = S.prototype) !== C.prototype && isObject(P) && setPrototypeOf){
+ setPrototypeOf(that, P);
+ } return that;
+};
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