Array Grid Provider Configuration
This is how a grid with an array provider source can be configured. Technically not even an exclude column is required - but leaving only the source config in the example seemed like too little.
<?xml version="1.0"?>
<grid xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:module:Hyva_Admin:etc/hyva-grid.xsd">
<source>
<arrayProvider>Hyva\AdminTest\Model\LogFileListProvider</arrayProvider>
</source>
<columns>
<exclude>
<column name="leaf"/>
</exclude>
</columns>
</grid>