/**
* @param string $label
* @param callable $callback
*/
public function __construct($label, callable $callback)
{
parent::__construct();
$this->callback = $callback;
$this->label = (string) $label;
}
/** @param string $label */
public function __construct($label)
{
parent::__construct();
$this->label = (string) $label;
}
