public static VersionedReference <TRef> UpdateIncrement <TAtomic, TRef>(
this TAtomic atom,
VersionedReference <TRef> newRefExpectedVersion)
where TAtomic : IAtomic <VersionedReference <TRef> >
where TRef : class;
public bool Equals(VersionedReference <TRef> other) => ReferenceEquals(Reference, other.Reference) && Version == other.Version;