| import keys from './keys.js';// Invert the keys and values of an object. The values must be serializable.export default function invert(obj) {  var result = {};  var _keys = keys(obj);  for (var i = 0, length = _keys.length; i < length; i++) {    result[obj[_keys[i]]] = _keys[i];  }  return result;}
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