Additional subnav bar row

I need another sub nav row in my app or a way to make a toolbar fixed under a navbar with subnav so they are all fixed together. any way to do this? To explain in another way: i have a navbar with a subnav bar. i need another subnavbar under that that is also fixed.

This is not supported by default. You need to apply custom styles to achieve it

that is what i ended up doing, thank you for clarifying.