OpenSkill\Datatable\Composers\ColumnComposer::setCallableColumn PHP Method

    private function setCallableColumn($config, $callable)
    {
        if (is_callable($callable)) {
            $config->withCallable($callable);
        } elseif (is_string($callable)) {
            $config->withCallable(function () use($callable) {
                return $callable;
            });
        }
    }