code: public java.util.List<HsmClientCertificate> getHsmClientCertificates() {
          if (hsmClientCertificates == null) {
              hsmClientCertificates = new com.amazonaws.internal.SdkInternalList<HsmClientCertificate>();
          }
          return hsmClientCertificates;
      }
docs: <p>
  A list of the identifiers for one or more HSM client certificates used by Amazon Redshift clusters to store and
  retrieve database encryption keys in an HSM.
  </p>
  
  @return A list of the identifiers for one or more HSM client certificates used by Amazon Redshift clusters to
  store and retrieve database encryption keys in an HSM.