code: public void marshall(GetRelationalDatabaseLogEventsRequest getRelationalDatabaseLogEventsRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (getRelationalDatabaseLogEventsRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getRelationalDatabaseName(), RELATIONALDATABASENAME_BINDING);
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getLogStreamName(), LOGSTREAMNAME_BINDING);
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getStartTime(), STARTTIME_BINDING);
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getEndTime(), ENDTIME_BINDING);
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getStartFromHead(), STARTFROMHEAD_BINDING);
              protocolMarshaller.marshall(getRelationalDatabaseLogEventsRequest.getPageToken(), PAGETOKEN_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.