Is vyatta-cfg used in vyos

I am new to vyos, I see vyconf is used in vyos 1.2.0. And I also find vyatta-cfg when I use scripts/build-package -l. I think vyconf and vyatta-cfg have the same features but different implementation. Am I right? Will vyatta-cfg be replaced by vyconf in vyos in future?

I already know it. vyconf is just a tool to generate vyatta-cfg files.