code: public DeleteFleetsResult withSuccessfulFleetDeletions(DeleteFleetSuccessItem... successfulFleetDeletions) {
          if (this.successfulFleetDeletions == null) {
              setSuccessfulFleetDeletions(new com.amazonaws.internal.SdkInternalList<DeleteFleetSuccessItem>(successfulFleetDeletions.length));
          }
          for (DeleteFleetSuccessItem ele : successfulFleetDeletions) {
              this.successfulFleetDeletions.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the EC2 Fleets that are successfully deleted.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSuccessfulFleetDeletions(java.util.Collection)} or
  {@link #withSuccessfulFleetDeletions(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param successfulFleetDeletions
  Information about the EC2 Fleets that are successfully deleted.
  @return Returns a reference to this object so that method calls can be chained together.