Make scheduler show as collapsed by default

[NationalGroup]

Can we make our scheduler show as collapsed by default when we go into the screen? Our developers are struggling to do it?

My screenshot attached is what i want it to look like.

[mats]

Try calling https://bryntum.com/docs/scheduler/#Grid/feature/Group#function-collapseAll when you have loaded your data?

[NationalGroup]

Hello, I tried the above approach and it is not working as per the requirement, kindly provide the elaborated command or way to implement the above functionality.
Regards

[mats]

Please show what you tried? Something like this should work well:

scheduler.resourceStore.on({
    load: () => scheduler.collapseAll();
})

[NationalGroup]

Thanks