How do I make a function not appear on UnityEvents / Button OnClick lists?

I have a Unity UGUI Button which has a OnClick UnityEvent, where public functions can be called.

However, I don't want some functions to be accessible in the editor to avoid mistakes from other people, but they are being used in the code.

Is there a way I can make a public void function hidden in the UnityEvents list?

For example: ConsolidateEntry () should not appear here.

It would also be ok if all the functions of this class/object were not an option to add to OnClick.