src/Action/BaseAction.php
protected function processMessage(&$message)
    {
        if (!$message instanceof \Closure) {
            return;
        }

        $callback = $message;
        $message = $callback($this->model);
    }
protected function processMessage(&$message)
    {
        if (!$message instanceof \Closure) {
            return;
        }

        $callback = $message;
        $message = $callback($this->model);
    }
Process message that contains callback
@author Olawale Lawal <wale@cottacush.com>
@param $message