Add SlugAwareInterface for Page entity

Author: dbalabka

src/Entity/PageInterface.php

@@ -14,6 +14,7 @@
 
 use Sylius\Component\Channel\Model\ChannelsAwareInterface;
 use Sylius\Component\Resource\Model\ResourceInterface;
+use Sylius\Component\Resource\Model\SlugAwareInterface;
 use Sylius\Component\Resource\Model\TimestampableInterface;
 use Sylius\Component\Resource\Model\ToggleableInterface;
 use Sylius\Component\Resource\Model\TranslatableInterface;
@@ -26,12 +27,9 @@ interface PageInterface extends
     SectionableInterface,
     TimestampableInterface,
     ChannelsAwareInterface,
-    ContentableInterface
+    ContentableInterface,
+    SlugAwareInterface
 {
-    public function getSlug(): ?string;
-
-    public function setSlug(?string $slug): void;
-
     public function getCode(): ?string;
 
     public function setCode(?string $code): void;