docs: public void marshall(SpekeKeyProvider spekeKeyProvider, ProtocolMarshaller protocolMarshaller) {
  
          if (spekeKeyProvider == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(spekeKeyProvider.getCertificateArn(), CERTIFICATEARN_BINDING);
              protocolMarshaller.marshall(spekeKeyProvider.getResourceId(), RESOURCEID_BINDING);
              protocolMarshaller.marshall(spekeKeyProvider.getRoleArn(), ROLEARN_BINDING);
              protocolMarshaller.marshall(spekeKeyProvider.getSystemIds(), SYSTEMIDS_BINDING);
              protocolMarshaller.marshall(spekeKeyProvider.getUrl(), URL_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }