fin du tuto, les vrais galere commence

site/plugins/your-plugin/index.php

@@ -1,7 +1,20 @@
 <?php
 
 Kirby::plugin('getkirby/pluginkit', [
-  'sections' => [
-    'demo' => []
+  'fields' => [
+    'demo' => [
+      'props' => [
+        'value' => function ($value = null) {
+          $margins = Yaml::decode($value);
+          return [
+            'top' => 0,
+            'right' => 0,
+            'bottom' => 0,
+            'left' => 0,
+            ...$margins
+          ];
+        }
+      ]
+    ]
   ],
 ]);