refactor: list and fetch

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

shared/lib/Resource/Provider/Node/NodeBaseAbstract.php

@@ -71,6 +71,13 @@ abstract class NodeBaseAbstract implements NodeBaseInterface {
         return $this->data[static::PROPERTY_TYPE];
     }
 
+    /**
+     * @inheritDoc
+     */
+    public function urn(): string {
+        return (string) $this->nodeIdentifier();
+    }
+
     /**
      * @inheritDoc
      */