Cezary Dziemian raised a question on lightning-dev regarding channel funding:

About weak ago I talked with Christian Decker, and he told me, that there is plan to implement possibility of both-side funding channels. He told me, that I will be able (for example) to pay 100 sat for peer if he agreed to put some of his funds to channel. Everything in single, trustless transaction.

Do I understand this correctly? And if so, do you have any predictions when it could be implemented?