code: public void marshall(DeleteItemRequest deleteItemRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (deleteItemRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(deleteItemRequest.getTableName(), TABLENAME_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getKey(), KEY_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getExpected(), EXPECTED_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getConditionalOperator(), CONDITIONALOPERATOR_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getReturnValues(), RETURNVALUES_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getReturnConsumedCapacity(), RETURNCONSUMEDCAPACITY_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getReturnItemCollectionMetrics(), RETURNITEMCOLLECTIONMETRICS_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getConditionExpression(), CONDITIONEXPRESSION_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getExpressionAttributeNames(), EXPRESSIONATTRIBUTENAMES_BINDING);
              protocolMarshaller.marshall(deleteItemRequest.getExpressionAttributeValues(), EXPRESSIONATTRIBUTEVALUES_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.