function _syncStartup() {
    // We refresh state before calling parent because syncStartup in the parent
    // looks for changed IDs, which is dependent on add-on state being up to
    // date.
    this._refreshReconcilerState();

    SyncEngine.prototype._syncStartup.call(this);
  }
/**
   * Override start of sync function to refresh reconciler.
   *
   * Many functions in this class assume the reconciler is refreshed at the
   * top of a sync. If this ever changes, those functions should be revisited.
   *
   * Technically speaking, we don't need to refresh the reconciler on every
   * sync since it is installed as an AddonManager listener. However, add-ons
   * are complicated and we force a full refresh, just in case the listeners
   * missed something.
   */
Override start of sync function to refresh reconciler.
Many functions in this class assume the reconciler is refreshed at the
top of a sync. If this ever changes, those functions should be revisited.

Technically speaking, we don't need to refresh the reconciler on every
sync since it is installed as an AddonManager listener. However, add-ons
are complicated and we force a full refresh, just in case the listeners
missed something.
Override start of sync function to refresh reconciler . Many functions in this class assume the reconciler is refreshed at the top of a sync . If this ever changes those functions should be revisited . Technically speaking we don ' t need to refresh the reconciler on every sync since it is installed as an AddonManager listener . However add - ons are complicated and we force a full refresh just in case the listeners missed something .
function _syncStartup() {
    this._refreshReconcilerState();
    SyncEngine.prototype._syncStartup.call(this);
  }
function _syncStartup ( ) { this . _refreshReconcilerState ( ) ; SyncEngine . prototype . _syncStartup . call ( this ) ; }
Override start of sync function to refresh reconciler.
Override start of sync function to refresh reconciler .
// We refresh state before calling parent because syncStartup in the parent // looks for changed IDs, which is dependent on add-on state being up to // date.