src/Contact/Friends.php
public function update($username, $list = null) :array
    {
        $username = is_array($username) ?: [$username];

        return parent::update($username, $this->makeUsernameList($username));
    }
public function update($username, $list = null) :array
    {
        $username = is_array($username) ?: [$username];

        return parent::update($username, $this->makeUsernameList($username));
    }
更新群组.

@param $username
@param null $list

@return array