src/Laravel/Param/GroupParam.php
public function get($group_name, $param_name)
    {
        $this->createIfNotExist($group_name);

        $this->checkParam($param_name);

        return $this->params[$group_name][$param_name];
    }
public function get($group_name, $param_name)
    {
        $this->createIfNotExist($group_name);

        $this->checkParam($param_name);

        return $this->params[$group_name][$param_name];
    }
@param string $group_name
@param string $param_name

@return mixed