ApplyValueMutator uses the Visitor design pattern to modify all the values associated with this answer by applying the ValueMutator delegate, in turn, to each value. This can be useful if you want to apply the same modification to all values in an answer, such as marking all of them userModifiable=false.

public abstract void ApplyValueMutator<T>(
	Answer..::..ValueMutator<T> mutator
)
where T : IValue

public abstract void ApplyValueMutator<T>(
	Answer..::..ValueMutator<T> mutator
)
where T : IValue