private function uncollapseErrors(&$log)
    {
        $groupStack = array();
        for ($i = 0, $count = \count($log); $i < $count; $i++) {
            $method = $log[$i][0];
            if (\in_array($method, array('group', 'groupCollapsed'))) {
                $groupStack[] = $i;
            } elseif ($method == 'groupEnd') {
                \array_pop($groupStack);
            } elseif (\in_array($method, array('error', 'warn'))) {
                foreach ($groupStack as $i2) {
                    $log[$i2][0] = 'group';
                }
            }
        }
    }