12345678910111213
function XWrap(fn) {  this.f = fn;}XWrap.prototype['@@transducer/init'] = function() {  throw new Error('init not implemented on XWrap');};XWrap.prototype['@@transducer/result'] = function(acc) { return acc; };XWrap.prototype['@@transducer/step'] = function(acc, x) {  return this.f(acc, x);};
export default function _xwrap(fn) { return new XWrap(fn); }