{"ast":null,"code":"function RetryOperation(timeouts, options) {\n  // Compatibility for the old (timeouts, retryForever) signature\n  if (typeof options === 'boolean') {\n    options = {\n      forever: options\n    };\n  }\n  this._originalTimeouts = JSON.parse(JSON.stringify(timeouts));\n  this._timeouts = timeouts;\n  this._options = options || {};\n  this._maxRetryTime = options && options.maxRetryTime || Infinity;\n  this._fn = null;\n  this._errors = [];\n  this._attempts = 1;\n  this._operationTimeout = null;\n  this._operationTimeoutCb = null;\n  this._timeout = null;\n  this._operationStart = null;\n  this._timer = null;\n  if (this._options.forever) {\n    this._cachedTimeouts = this._timeouts.slice(0);\n  }\n}\nmodule.exports = RetryOperation;\nRetryOperation.prototype.reset = function () {\n  this._attempts = 1;\n  this._timeouts = this._originalTimeouts.slice(0);\n};\nRetryOperation.prototype.stop = function () {\n  if (this._timeout) {\n    clearTimeout(this._timeout);\n  }\n  if (this._timer) {\n    clearTimeout(this._timer);\n  }\n  this._timeouts = [];\n  this._cachedTimeouts = null;\n};\nRetryOperation.prototype.retry = function (err) {\n  if (this._timeout) {\n    clearTimeout(this._timeout);\n  }\n  if (!err) {\n    return false;\n  }\n  var currentTime = new Date().getTime();\n  if (err && currentTime - this._operationStart >= this._maxRetryTime) {\n    this._errors.push(err);\n    this._errors.unshift(new Error('RetryOperation timeout occurred'));\n    return false;\n  }\n  this._errors.push(err);\n  var timeout = this._timeouts.shift();\n  if (timeout === undefined) {\n    if (this._cachedTimeouts) {\n      // retry forever, only keep last error\n      this._errors.splice(0, this._errors.length - 1);\n      timeout = this._cachedTimeouts.slice(-1);\n    } else {\n      return false;\n    }\n  }\n  var self = this;\n  this._timer = setTimeout(function () {\n    self._attempts++;\n    if (self._operationTimeoutCb) {\n      self._timeout = setTimeout(function () {\n        self._operationTimeoutCb(self._attempts);\n      }, self._operationTimeout);\n      if (self._options.unref) {\n        self._timeout.unref();\n      }\n    }\n    self._fn(self._attempts);\n  }, timeout);\n  if (this._options.unref) {\n    this._timer.unref();\n  }\n  return true;\n};\nRetryOperation.prototype.attempt = function (fn, timeoutOps) {\n  this._fn = fn;\n  if (timeoutOps) {\n    if (timeoutOps.timeout) {\n      this._operationTimeout = timeoutOps.timeout;\n    }\n    if (timeoutOps.cb) {\n      this._operationTimeoutCb = timeoutOps.cb;\n    }\n  }\n  var self = this;\n  if (this._operationTimeoutCb) {\n    this._timeout = setTimeout(function () {\n      self._operationTimeoutCb();\n    }, self._operationTimeout);\n  }\n  this._operationStart = new Date().getTime();\n  this._fn(this._attempts);\n};\nRetryOperation.prototype.try = function (fn) {\n  console.log('Using RetryOperation.try() is deprecated');\n  this.attempt(fn);\n};\nRetryOperation.prototype.start = function (fn) {\n  console.log('Using RetryOperation.start() is deprecated');\n  this.attempt(fn);\n};\nRetryOperation.prototype.start = RetryOperation.prototype.try;\nRetryOperation.prototype.errors = function () {\n  return this._errors;\n};\nRetryOperation.prototype.attempts = function () {\n  return this._attempts;\n};\nRetryOperation.prototype.mainError = function () {\n  if (this._errors.length === 0) {\n    return null;\n  }\n  var counts = {};\n  var mainError = null;\n  var mainErrorCount = 0;\n  for (var i = 0; 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