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node_modules/core-js/internals/is-null-or-undefined.js

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+'use strict';
+// we can't use just `it == null` since of `document.all` special case
+// https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-aec
+module.exports = function (it) {
+  return it === null || it === undefined;
+};