Is there any way to edit the number of free buildings in a city? (Lua)

I know I can check if there's a normal building (GetNumBuilding) or a free building in a city (GetNumFreeBuilding). However, SetNumRealBuilding doesn't seem to affect free buildings. So, for example, if the city has a free monument and I SetNumRealBuilding Monument to 0, it doesn't do anything. There also doesn't appear to be a SetNumRealFreeBuilding equivalent.

So, is there any way to add or remove free buildings with lua?