False positive on access to protected/private properties and methods in macros

[MrMage]

Bug report

Using PHPStan 0.12.71.

I am using macros like the following, annotating $this as described in https://github.com/nunomaduro/larastan/issues/166:

use GuzzleHttp\Client;

\opencensus_trace_method(Client::class, 'send', function ($request, $options) {
            /** @var Client $this */
            return [
                'name' => 'Guzzle\Client::send',
                'attributes' => [
                    'uri' => $this->buildUri($request->getUri(), $options),
                ],
                'kind' => Span::KIND_CLIENT,
            ];
        });

This results in the following warning:

Call to private method buildUri() of class GuzzleHttp\Client.

It seems like PHPStan is unable to recognize that $this has access to protected and private fields and methods in this context. Is it possible to inform it that those fields and methods are available?

[mergeable[bot]]

This bug report is missing a link to reproduction on phpstan.org.

It will most likely be closed after manual review.

[sebastiansulinski]

I've experienced the same when creating macro for Laravel's Eloquent Builder - when trying to reference any protected property or method I get the Call to protected method / property ....

Example would be:

Builder::macro('testingProtectedAccess',function () {

    /** @var Builder $this */
    return $this->model->getPerPage();
});