[REF] Fix functions to be protected

[eileenmcnaughton]

I did some poking around & these function are not called outside the class

Once we can see that we can consider updating to save 0 to the table, allowing
a lot of simplification

[civibot]

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[eileenmcnaughton]

test this please

[seamuslee001]

I did a grep across the universe and didn't see any evidence of these functions being called outside of core