realityking/joomla-platform — comment on commit da852ffe9e17c4b515d131e41e122534b7cd3cda
File: libraries/joomla/mail/mail.php line 31
By realityking:

I thought about that one, the property has been part of the class (trough inheritance) since the big bang. I mainly see the use that tags to tell devs since what versions this will work.