downgrade to kirby v3

kirby/src/Toolkit/Silo.php

@@ -15,22 +15,34 @@ namespace Kirby\Toolkit;
  */
 class Silo
 {
-	public static array $data = [];
+	/**
+	 * @var array
+	 */
+	public static $data = [];
 
 	/**
-	 * Setter for new data
+	 * Setter for new data.
+	 *
+	 * @param string|array $key
+	 * @param mixed $value
+	 * @return array
 	 */
-	public static function set(string|array $key, $value = null): array
+	public static function set($key, $value = null): array
 	{
 		if (is_array($key) === true) {
 			return static::$data = array_merge(static::$data, $key);
+		} else {
+			static::$data[$key] = $value;
+			return static::$data;
 		}
-
-		static::$data[$key] = $value;
-		return static::$data;
 	}
 
-	public static function get(string|array $key = null, $default = null)
+	/**
+	 * @param string|array $key
+	 * @param mixed $default
+	 * @return mixed
+	 */
+	public static function get($key = null, $default = null)
 	{
 		if ($key === null) {
 			return static::$data;
@@ -41,6 +53,9 @@ class Silo
 
 	/**
 	 * Removes an item from the data array
+	 *
+	 * @param string|null $key
+	 * @return array
 	 */
 	public static function remove(string $key = null): array
 	{