Change has to isSet

src/Model/Metadata.php

@@ -21,7 +21,7 @@ final class Metadata implements MetadataInterface
 
     public function get(string $key): mixed
     {
-        if (!$this->has($key)) {
+        if (!$this->isSet($key)) {
             throw new MissingKeyException($key);
         }
 
@@ -35,7 +35,7 @@ final class Metadata implements MetadataInterface
         return $this;
     }
 
-    public function has(string $key): bool
+    public function isSet(string $key): bool
     {
         return array_key_exists($key, $this->metadata);
     }