private static void RemoveFromRelationList <T>(string key, T relation, TstDictionaries fromRelations)
where T : RelationBase <T>
{
if (key != null)
{
TstDictionary list = fromRelations[key];
if (list != null)
{
string href = relation.HRef;
if (href != null && !list.Contains(href))
{
list.Remove(href);
}
if (list.Count == 0)
{
fromRelations.Remove(key);
}
}
}
}
