docs: public void marshall(GetShardIteratorRequest getShardIteratorRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (getShardIteratorRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(getShardIteratorRequest.getStreamArn(), STREAMARN_BINDING);
              protocolMarshaller.marshall(getShardIteratorRequest.getShardId(), SHARDID_BINDING);
              protocolMarshaller.marshall(getShardIteratorRequest.getShardIteratorType(), SHARDITERATORTYPE_BINDING);
              protocolMarshaller.marshall(getShardIteratorRequest.getSequenceNumber(), SEQUENCENUMBER_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }