Thank you for the explaination!

In my case it seems to be okay to call methods of objects whose references are accessible as attributes of some "upper" objects. If all these classes are well-documented, it shouldn't lead to any difficulties.

By the way, Mojolicious has the same apporach, you can often see something like "my $host = $c->req->url->to_abs->host;" in the code of Mojolicious-based applications.