In on-prem scenario we had cl_gui_frontend_services to work with files. What is better way to work with files in Cloud Platform Abap environment? It's doesn't matter xlsx, txt or another filetype. That is very important to work with them and i'm don't satisfied with some scenarios like abap file uploader( someone custom development ), I need some solutions to make it in cloud with help of existing functionality how it was in on-prem sap i.m. to implement this in abap cloud without development of any additional services outside abap environment (don't make new services for any movement and make it without resorting to other programming languages i.m. only in abap cloud environment). It was a lot of standard functionality in on-prem sap systems and so that you have to spend a lot of time(years) to implement functionality that you needed. ( a good example is cl_gui_frontend_services, but it is only a one of a thousands ).