Dear All,
during implementing OData services and UI5 BSP apps, I was thinking, why we miss a message parameter from the GateWay Data Provider class interfaces? In every ABAP application having variety of UIs so far, we had the possibility to communicate with the users using messages, during data processing, and executing actions. This was supported by the SAP standard. In SAP GUI we can use the message statement, in WebDynpro, we can use the WD framework to display a message, In Floorplan manager, we have the posibility to return BAPI messages also, on every phase of the processing, so that is displayed on the UI.