magento-test/app/code/Magento/Bundle/Test/Mftf/ActionGroup/AdminOpenAndApplyBundleItemsOptionPerPageActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="AdminOpenAndApplyBundleItemsOptionPerPageActionGroup">
        <annotations>
            <description>Open the bundle item options drop down section and assign the user defined custom value</description>
        </annotations>
        <arguments>
            <argument name="perPageInputValue" type="string" defaultValue="1"/>
        </arguments>

        <click selector="{{AdminProductGridPaginationSection.perPageDropdown}}" stepKey="clickProductPerPageDropdown"/>
        <click selector="{{AdminProductGridPaginationSection.perPageOption('Custom')}}" stepKey="selectCustomPerPage"/>
        <fillField selector="{{AdminProductGridPaginationSection.perPageInput}}" userInput="{{perPageInputValue}}" stepKey="fillCustomPerPage"/>
        <click selector="{{AdminProductGridPaginationSection.perPageApplyInput}}" stepKey="applyCustomPerPage"/>
        <waitForPageLoad stepKey="waitForPageRefreshCustomPerPage"/>
    </actionGroup>
</actionGroups>