73     private static string $stack;  variable in Fisharebest\\Webtrees\\View
97      * @param string $stack
101     public static function push(string $stack): void  argument
103         self::$stack = $stack;
121         self::$stacks[self::$stack][] = $content;
127      * @param string $stack
131     public static function pushunique(string $stack): void  argument
133         self::$stack = $stack;
151         self::$stacks[self::$stack][sha1($content)] = $content;
157      * @param string $stack
161     public static function stack(string $stack): string  argument
163         $content = implode('', self::$stacks[$stack] ?? []);
165         self::$stacks[$stack] = [];