I'm building the first HCM PF Fiori form for a client. One of the problem I see here is that drop down fields do not take over the domain values defined in the backend service of that form. Am I doing something wrong or is it not supported? Even if I would build it in IF_HRASR00GEN_SERVICE~GET_HELP_VALUES, this method is only called when explicitly tapping on the input search button, so all fields of type DROPDOWN in the metadata table come without a list of values. And what is the purpose of the field F4 Parent Field?