public function setActions($actions)
    {
        if ($this->getState() != self::INIT) {
            throw new \RuntimeException('Invalid state.');
        }

        if (count($actions) == 0) {
            $this->setState(self::INVALID);
            throw new \RuntimeException('No actions given.');
        }

        $this->actions = array_combine($actions, $actions);
        $this->setState(self::REGISTER);

        return $this;
    }