How do I persist the isCollapsed value of Resizable.Pane in the Mail example?

[beltebelt]

Hello,

I have just started to use this project and was playing around with the "Mail" example. I made some modifications and included additional routes and noticed that when I navigate to a different route, the value of isCollapsed is restored to default. i.e. if the sidebar was collapsed before navigation, after navigation it's no longer collapsed. This might not be specific to this project, but I was just wondering what would be the recommended way to persist the collapsed state of this sidebar?

For reference, this resizable pane