di.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright (c) 2019 TechDivision GmbH
 * All rights reserved
 *
 * This product includes proprietary software developed at TechDivision GmbH, Germany
 * For more information see http://www.techdivision.com/
 *
 * To obtain a valid license for using this software please contact us at
 * license@techdivision.com
 *
 * @copyright  Copyright (c) 2019 TechDivision GmbH (http://www.techdivision.com)
 * @author     Vadim Justus <v.justus@techdivision.com>
 * @link       http://www.techdivision.com/
 */
 -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="TechDivision\PacemakerOrderExport\Model\ExportFormatProvider">
        <arguments>
            <argument name="formatList" xsi:type="array">
                <item name="my_custom_format" xsi:type="array">
                    <item name="code" xsi:type="string">my_custom_format</item>
                    <item name="label" xsi:type="string">My Custom Format</item>
                    <item name="type" xsi:type="string">TechDivision\OrderWorkflowCustomExportFormat\Model\CustomOrderFormatExecutor</item>
                </item>
            </argument>
        </arguments>
    </type>
</config>