AdminSlideOutDialogSection.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
   /**
    * Copyright © Magento, Inc. All rights reserved.
    * See COPYING.txt for license details.
    */
  -->
<sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
    <section name="AdminSlideOutDialogSection">
        <element name="closeButton" type="button" selector=".modal-slide._show [data-role='closeBtn']" timeout="30"/>
        <element name="cancelButton" type="button" selector="//*[contains(@class, 'modal-slide') and contains(@class, '_show')]//*[contains(@class, 'page-actions')]//button[normalize-space(.)='Cancel']" timeout="30"/>
        <element name="doneButton" type="button" selector="//*[contains(@class, 'modal-slide') and contains(@class, '_show')]//*[contains(@class, 'page-actions')]//button[normalize-space(.)='Done']" timeout="30"/>
        <element name="saveButton" type="button" selector="//*[contains(@class, 'modal-slide') and contains(@class, '_show')]//*[contains(@class, 'page-actions')]//button[normalize-space(.)='Save']" timeout="30"/>
    </section>
</sections>