I have researched Steem wallet github. There are several instances of repository creation for Tron link and Tron wallet. This code is used to create transfer capability in between a Steem wallet and Tron wallet, such as Tron wallets which exist on Just and Justswap. This is a curious development as wallets are usually for a single cryptocurrency. Sending a cryptocurrency to the wallet of another wallet usually results in the permanent loss of the cryptocurrency. I believe there may be some multiple cryptocurrency wallets in existence, but I am not aware of them. It is more likely that the Tron team is building a GUI or graphic user interface in the Steem wallet to transfer Steem to a Steem wallet or they are doing something new like anintrawallet Atomic swap, where you send Steem to a Tron wallet because you are swapping mid transfer. This is only one possible explanation, but I mention it because Justin Sun mentioned Atomic Swaps in the February AMA, or should I say his spokesperson said Justin Sun would be making history with the first cross-chain atomic swaps making blockchain history.