code: public DescribeNotificationConfigurationsResult withNotificationConfigurations(NotificationConfiguration... notificationConfigurations) {
          if (this.notificationConfigurations == null) {
              setNotificationConfigurations(new com.amazonaws.internal.SdkInternalList<NotificationConfiguration>(notificationConfigurations.length));
          }
          for (NotificationConfiguration ele : notificationConfigurations) {
              this.notificationConfigurations.add(ele);
          }
          return this;
      }
docs: <p>
  The notification configurations.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setNotificationConfigurations(java.util.Collection)} or
  {@link #withNotificationConfigurations(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param notificationConfigurations
  The notification configurations.
  @return Returns a reference to this object so that method calls can be chained together.