code: public java.util.List<SuccessfulInstanceCreditSpecificationItem> getSuccessfulInstanceCreditSpecifications() {
          if (successfulInstanceCreditSpecifications == null) {
              successfulInstanceCreditSpecifications = new com.amazonaws.internal.SdkInternalList<SuccessfulInstanceCreditSpecificationItem>();
          }
          return successfulInstanceCreditSpecifications;
      }
docs: <p>
  Information about the instances whose credit option for CPU usage was successfully modified.
  </p>
  
  @return Information about the instances whose credit option for CPU usage was successfully modified.