if (!empty($col_cfg['renderer'])) {
if (is_a($col_cfg['renderer'], 'Closure')) {
- $col_cfg['renderer']->call($this, $cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $cl);
+ $col_cfg['renderer']->call(null, $cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $cl);
} else {
// not sure if row is correct here...!!!?
call_user_func($col_cfg['renderer'], $cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $cl);