How to add payload data?

[nutella]

I've tried with something like:

$data = [];
$data['id'] = 10;
$data['link'] = 'https://www.github.com';
$client -> build($recipient, $notification, $data);

But got this error: "Got error 'PHP message: PHP Fatal error: Uncaught TypeError: Argument 3 passed to phpFCMv1\Client::build() must be an instance of phpFCMv1\Data or null, array given"

...but $data is an array...

What's wrong?

Thanks.

[nutella]

This seems to work:

$data = new Data();
$foo['id'] = 10;
$foo['link'] = 'https://www.github.com';
$bar['data'] = $foo;
$data->setPayload($bar);
$client -> build($recipient, $notification, $data);