pub unsafe extern "C" fn FMPutSlotInstance(
arg1: *mut FactModifier,
arg2: *const c_char,
arg3: *mut Instance,
) -> PutSlotErrorpub unsafe extern "C" fn FMPutSlotInstance(
arg1: *mut FactModifier,
arg2: *const c_char,
arg3: *mut Instance,
) -> PutSlotError