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node_modules/core-js-pure/internals/inherit-if-required.js

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+'use strict';
+var isCallable = require('../internals/is-callable');
+var isObject = require('../internals/is-object');
+var setPrototypeOf = require('../internals/object-set-prototype-of');
+
+// makes subclassing work correct for wrapped built-ins
+module.exports = function ($this, dummy, Wrapper) {
+  var NewTarget, NewTargetPrototype;
+  if (
+    // it can work only with native `setPrototypeOf`
+    setPrototypeOf &&
+    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+    isCallable(NewTarget = dummy.constructor) &&
+    NewTarget !== Wrapper &&
+    isObject(NewTargetPrototype = NewTarget.prototype) &&
+    NewTargetPrototype !== Wrapper.prototype
+  ) setPrototypeOf($this, NewTargetPrototype);
+  return $this;
+};