code: public ModifyInstanceCreditSpecificationResult withSuccessfulInstanceCreditSpecifications(
              SuccessfulInstanceCreditSpecificationItem... successfulInstanceCreditSpecifications) {
          if (this.successfulInstanceCreditSpecifications == null) {
              setSuccessfulInstanceCreditSpecifications(new com.amazonaws.internal.SdkInternalList<SuccessfulInstanceCreditSpecificationItem>(
                      successfulInstanceCreditSpecifications.length));
          }
          for (SuccessfulInstanceCreditSpecificationItem ele : successfulInstanceCreditSpecifications) {
              this.successfulInstanceCreditSpecifications.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the instances whose credit option for CPU usage was successfully modified.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSuccessfulInstanceCreditSpecifications(java.util.Collection)} or
  {@link #withSuccessfulInstanceCreditSpecifications(java.util.Collection)} if you want to override the existing
  values.
  </p>
  
  @param successfulInstanceCreditSpecifications
  Information about the instances whose credit option for CPU usage was successfully modified.
  @return Returns a reference to this object so that method calls can be chained together.