// TODO: Consider if ContentSpecs are equal even if Constraint doesn't matches, but Content matches.
// As we only want a single entry even when Constraints differ, one might lean towards only checking the Content object??
// If we keep the current implementation then:
// - We can have the same Content multiple times processed
// - JSON.NET does not properly detect self referencing problems
// TODO: This would also be a problem for Entity Framework, etc, or not?
public bool Equals(ContentSpec <T> other) => other?.GetHashCode() == GetHashCode();
public void Replace(ContentSpec existing, Content n)
{
Contents.Remove(existing);
Contents.Add(new ContentSpec(n, existing.Constraint));
}