From 778aade67a9368e9630189ec7b024f99d9969e49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Toni=20Viemer=C3=B6?= <toni.viemero@iki.fi>
Date: Wed, 4 Feb 2026 14:47:34 +0200
Subject: [PATCH] Fix nullable type declaration

---
 classes/Visualizer/Module/Chart.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/classes/Visualizer/Module/Chart.php b/classes/Visualizer/Module/Chart.php
index 00de88a4e..8bf503f6e 100644
--- a/classes/Visualizer/Module/Chart.php
+++ b/classes/Visualizer/Module/Chart.php
@@ -375,11 +375,11 @@ public function getCharts() {
 	 *
 	 * @access private
 	 *
-	 * @param WP_Post $chart The chart object.
+	 * @param WP_Post|null $chart The chart object.
 	 *
 	 * @return array The array of chart data.
 	 */
-	private function _getChartArray( WP_Post $chart = null ) {
+	private function _getChartArray( ?WP_Post $chart = null ) {
 		if ( is_null( $chart ) ) {
 			$chart = $this->_chart;
 		}