$client = new TextClient('your-api-key');
$message = new Message('Message text', 'Sender_name',
    ['Recipient_PhoneNumber']);
$message
    ->WithChannels([Channels::WHATSAPP])
    ->WithHybridAppKey('your-secret-hybrid-app-key')
    ->WithRichMessage(
        new MediaMessage(
            'cm.com',
            'https://avatars3.githubusercontent.com/u/
8234794?s=200&v=4',
            'image/png'
        )
    )
    ->WithSuggestions([
        new ReplySuggestion('Opt In', 'OK'),
        new ReplySuggestion('Opt Out', 'STOP'),
    ]);
$result = $client->send($message);