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node_modules/core-js/modules/esnext.iterator.dispose.js

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+'use strict';
+// https://github.com/tc39/proposal-explicit-resource-management
+var call = require('../internals/function-call');
+var defineBuiltIn = require('../internals/define-built-in');
+var getMethod = require('../internals/get-method');
+var hasOwn = require('../internals/has-own-property');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;
+
+var DISPOSE = wellKnownSymbol('dispose');
+
+if (!hasOwn(IteratorPrototype, DISPOSE)) {
+  defineBuiltIn(IteratorPrototype, DISPOSE, function () {
+    var $return = getMethod(this, 'return');
+    if ($return) call($return, this);
+  });
+}