Twitter\Intents\Tweet::setVia PHP Method

    public function setVia($username)
    {
        $username = \Twitter\Helpers\Validators\ScreenName::trim($username);
        if ($username) {
            if ($this->validate_inputs) {
                if (\Twitter\Helpers\Validators\ScreenName::isValid($username)) {
                    $this->via = $username;
                }
            } else {
                $this->via = $username;
            }
        }
        return $this;
    }