public static ValueTree Create(IEnumerable <KeyValuePair <string, EquatableObject> > items)
{
Contracts.AssertValue(items);
#if DEBUG
foreach (var item in items)
{
Contracts.AssertNonEmpty(item.Key);
Contracts.Assert(item.Value.IsValid);
}
#endif
return(new ValueTree(RedBlackNode <EquatableObject> .Create(items)));
}