Change NodeProviderInterface::getNode() to return Hexadecimal

src/Provider/NodeProviderInterface.php

@@ -14,18 +14,17 @@ declare(strict_types=1);
 
 namespace Ramsey\Uuid\Provider;
 
+use Ramsey\Uuid\Type\Hexadecimal;
+
 /**
- * A node provider retrieves the system node ID
- *
- * The system node ID, or host ID, is often the same as the MAC address for a
- * network interface on the host.
+ * A node provider retrieves or generates a node ID
  */
 interface NodeProviderInterface
 {
     /**
-     * Returns the system node ID
+     * Returns a node ID
      *
-     * @return string|false|null System node ID as a hexadecimal string
+     * @return Hexadecimal The node ID as a hexadecimal string
      */
-    public function getNode();
+    public function getNode(): Hexadecimal;
 }