src/Contact/Groups.php
public function get($key, $default = null)
    {
        $group = parent::get($key);

        return $group ?: current($this->update($key));
    }
public function get($key, $default = null)
    {
        $group = parent::get($key);

        return $group ?: current($this->update($key));
    }
修改群组获取，为空时更新群组.

@param mixed $key
@param null  $default

@return mixed