Is there any class/file from module-config
module that can be useful whether single_store_mode value has been changed from yes to no or vice-versa.
Have checked admin_config related events but these are not useful as these are calling after save.
EDIT:
I want to have before Save as well as after Save value so i can compare whether value has been changed or not?
Tried to implement two approaches but unfortunately it's not working.
By applying
source_model
on thegeneral/single_store_mode/enabled
in custom module'ssystem.xml
Using beforeSave() plugin on
Magento\Config\Model\Config