Add todo

src/wp-includes/class-wp-block.php

@@ -657,6 +657,9 @@ public function set_inner_html( string $html ): bool {
 		return true;
 	}
 
+	/**
+	 * @todo check for self-closing foreign content tags
+	 */
 	public function proceed_to_matching_closer(): bool {
 		$tag_name = $this->get_tag();