show image on view product photos page, setEntityClass defaulting to all plugin entities

templates/ProductPhotos/view.php

@@ -17,6 +17,10 @@
     <div class="column column-80">
         <div class="productPhotos view content">
             <h3><?= h($productPhoto->photo_filename) ?></h3>
+            <img src="<?= $this->Url->build([
+                    'action' => 'image',
+                    $productPhoto->id,
+            ]); ?>" alt="<?= $productPhoto->id; ?>"/>
             <table>
                 <tr>
                     <th><?= __('Id') ?></th>