Make anonymous providers serialisable

Replaced anonymous class with ProviderProvider in ProviderSetProvider. This makes it serialisable.This improves code reuse and readability by consolidating instance retrieval logic into a dedicated class.

src/di/ProviderProvider.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Di;
+
+use Ray\Di\Di\Set;
+
+final class ProviderProvider implements ProviderInterface
+{
+    /** @var InjectorInterface  */
+    private $injector;
+
+    /** @var InjectorInterface */
+    private $interface;
+
+    /** @var Set */
+    private $set;
+
+    public function __construct(InjectorInterface $injector, Set $set)
+    {
+        $this->injector = $injector;
+        $this->set = $set;
+    }
+
+    public function get()
+    {
+        return $this->injector->getInstance($this->set->interface, $this->set->name);
+    }
+}

src/di/ProviderSetProvider.php

@@ -48,30 +48,6 @@ public function get()
             throw new SetNotFound((string) $this->ip->getParameter());
         }
 
-        return new class ($this->injector, $set) implements ProviderInterface
-        {
-            /** @var InjectorInterface  */
-            private $injector;
-
-            /** @var Set<object>  */
-            private $set;
-
-            /**
-             * @param Set<object> $set
-             */
-            public function __construct(InjectorInterface $injector, Set $set)
-            {
-                $this->injector = $injector;
-                $this->set = $set;
-            }
-
-            /**
-             * @return mixed
-             */
-            public function get()
-            {
-                return $this->injector->getInstance($this->set->interface, $this->set->name);
-            }
-        };
+        return new ProviderProvider($this->injector, $set);
     }
 }