<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <update handle="formkey"/>
    <update handle="magetop_messages_grid_block"/>
    <body>
        <referenceContainer name="content">
            <block class="Magetop\Messages\Block\Adminhtml\Messages" name="magetop.messages.container"/>
        </referenceContainer>        
    </body>
</page>