get() Method Throws NotFoundException

composer.json

@@ -3,7 +3,9 @@
     "type": "library",
     "require": {
         "php": "^8.4",
-        "potter/cloneable": "dev-main"
+        "potter/cloneable": "dev-main",
+        "potter/throwable": "dev-main",
+        "psr/container": "^2.0@dev"
     },
     "license": "MIT",
     "autoload": {

src/Potter/Aware/AwareTrait.php

@@ -14,7 +14,10 @@ trait AwareTrait
     
     final public function get(string $key): mixed
     {
-        return $this->aware[$key];
+        if ($this->has($key)) {
+            return $this->aware[$key];
+        }
+        throw new NotFoundException;
     }
     
     final public function has(string $key): bool

src/Potter/Aware/NotFoundException.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Potter\Aware;
+
+use \Psr\Container\NotFoundExceptionInterface;
+use \Potter\Throwable\Throwable;
+
+final class NotFoundException extends Throwable implements NotFoundExceptionInterface
+{
+
+}