code: public void setFailedSet(java.util.Collection<EventDetailsErrorItem> failedSet) {
          if (failedSet == null) {
              this.failedSet = null;
              return;
          }
  
          this.failedSet = new java.util.ArrayList<EventDetailsErrorItem>(failedSet);
      }
docs: <p>
  Error messages for any events that could not be retrieved.
  </p>
  
  @param failedSet
  Error messages for any events that could not be retrieved.