As a consultant you are posed the following question from a client who is using SAP S/4HANA Cloud, public edition and also SAP BTP, ABAP environment.
"We are currently using an SAP Fiori app based on SAP Fiori elements that analyzes open orders. We have determined that it should be extended via a new button on the UI which will perform an on- the-fly calculation and display the result in a quick popup for the enduser. We have been informed by SAP that all underlying stack layers for the SAP Fiori app have been extensibility enabled." Based on this which of the following extension types would you recommend to the customer to add the new button?