I'm creating a mixer via REST api call, then adding streams to that mixer. Is there a way to select specific layout for this mixer? I mean so that I can use, for example, grid layout for mixer 1, but desktop layout for mixer 2? I'm aware you can control layout by naming streams with a specific keyword, but it's not an option in my case, because streams already have specific names and I cannot just name some stream "desktop" (for example). What I would like is some way to control mixer layout via REST api calls themselves, or at least a way to choose "desktop" layout in a way not related to the name of stream I add to the mixer. After all, I explicitly state via api call that I want to add this stream to this mixer, maybe I can somehow also state that I want this stream to be a "desktop" one in the layout?