docs: public void marshall(UpdateItemRequest updateItemRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (updateItemRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(updateItemRequest.getTableName(), TABLENAME_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getKey(), KEY_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getAttributeUpdates(), ATTRIBUTEUPDATES_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getExpected(), EXPECTED_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getConditionalOperator(), CONDITIONALOPERATOR_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getReturnValues(), RETURNVALUES_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getReturnConsumedCapacity(), RETURNCONSUMEDCAPACITY_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getReturnItemCollectionMetrics(), RETURNITEMCOLLECTIONMETRICS_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getUpdateExpression(), UPDATEEXPRESSION_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getConditionExpression(), CONDITIONEXPRESSION_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getExpressionAttributeNames(), EXPRESSIONATTRIBUTENAMES_BINDING);
              protocolMarshaller.marshall(updateItemRequest.getExpressionAttributeValues(), EXPRESSIONATTRIBUTEVALUES_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }