Two components in a cell

Is it possible to attach two components to one layout cell ?I’d like to have a toolbar and under it a grid. Is this possible ? Or do I have to to create a cell for each one ?

And the cells of a tabbar are working the same way as the cells of a layout ? Can I have two components in a tabbar cell ?

Yes, it is possible.

Use for example:

the same for windows, tabbar, accordion.