I think the documentation is trying to refer to an add-on for Confluence Cloud now known as Confluence Google Drive. That said there's several integration add-ons you may be interested in, so here's a handy list:
Hope that helps! -nick wade
Head of Ecosystem, Marketplace
Gaining insight into your team’s effectiveness and choosing the right estimation technique. Estimating projects is hard. It is because people have the tendency to underestimate the time thin...
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