Change UIBBs dynamically (MAT / BP)

Hello specialists,

There is the possibility to override the properties of UIBBs by enhancing the method "/PLMU/IF_EX_FRW_APPCC_OVP~OVERRIDE_EVENT_OVP" in the class CL_MDG_BS_MAT_APPCC.

However, the class CL_MDG_BS_MAT_APPCC affects just material, but I also want to manage the state (like collapsed / hidden) of UIBBs for supplier and customer.

Is there an universal method called before any UI is shown or do I have to enhance multiple methods for supplier, customer, material and so on respectively?

Thanks for your help,

Steve