private static void EnsureEachLinkIsAnyOrExists(Pairs.Links links, params ulong[] sequence)
{
if (sequence == null)
return;
for (var i = 0; i < sequence.Length; i++)
if (sequence[i] != Pairs.Links.Null && !links.Exists(sequence[i]))
throw new ArgumentLinkDoesNotExistsException<ulong>(sequence[i],
string.Format("patternSequence[{0}]", i));
}