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export function type(input) {  if (input === null) {    return 'Null'  } else if (input === undefined) {    return 'Undefined'  } else if (Number.isNaN(input)) {    return 'NaN'  }  const typeResult = Object.prototype.toString.call(input).slice(8, -1)
  return typeResult === 'AsyncFunction' ? 'Async' : typeResult}