src/SnooPHP/Http/Router.php
public function error(Callable $action = null)
	{
		if ($action) $this->errorAction = $action;
		return $this->errorAction;
	}
public function error(Callable $action = null)
	{
		if ($action) $this->errorAction = $action;
		return $this->errorAction;
	}
Get or set error action

@param Callable|null $action action to be executed

@return Callable