Bar is a component that represents a horizontal bar, generally combined with inner elements like a back button, an action button, or data filters. It is generally placed right above components like Box (see example), DataView, Split and CardLayout.childrenReact nodeBar. Overrides both primary and secondary and their default spacing. You should generally prefer using primary and secondary, when possible.primaryReact nodeBar. The BackButton component is often used here.secondaryReact nodeBar.