Hi,   I'm looking at the TMARSFDDataModuleResource and I see that it has protected members `FD` (TMarsFireDAC) and `URL` (TMARSURL).  In my descendant class both of these are `nil` references.  Is there a way to use this?   Reason is I'm trying to switch DB connections based on the server's own host URL.  E.g. if it's accessed via localhost or 192.168.x.x then use the LOCAL_DB connection def, otherwise use PROD_DB   Edit: Which also begs the question, where is the best place to call `FD.ConnectionDefName := MyConnectionDefName;` ?     Thanks
Stuart