HP-1751 created ParentNodeDefinitionInterface

Author: VadymHrechukha

src/product/ParentNodeDefinitionInterface.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+namespace hiqdev\php\billing\product;
+
+interface ParentNodeDefinitionInterface
+{
+    public function withBehaviors(): BehaviorCollection;
+}