PrototypeElement::tag() - return null if $this::$tagName doesn't exist

Author: codemasher

src/Node/PrototypeElement.php

@@ -65,7 +65,7 @@ public function insert_top(PrototypeElement $node):PrototypeElement;
 	public function insert_bottom(PrototypeElement $node):PrototypeElement;
 
 	/**
-	 * Returns the element tag name (convenience method)
+	 * Returns the element tag name (convenience method) or null if the property doesn't exist
 	 */
-	public function tag():string;
+	public function tag():?string;
 }

src/Node/PrototypeElementTrait.php

@@ -119,7 +119,7 @@ public function insert_bottom(PrototypeElement $node):PrototypeElement{
 	/**
 	 * @inheritDoc
 	 */
-	public function tag():string{
-		return $this->tagName;
+	public function tag():?string{
+		return $this->tagName ?? null;
 	}
 }