/// <inheritdoc />
protected WrappingPile(IEnumerable <T> items)
: base(skipLogicInit: true)
{
if (items is null)
{
ThrowHelper.ThrowArgNull(nameof(items));
}
//_unwrapper = unwrapper ?? _defunwrapper;
Adder = i => _logic.AddHead(Wrap(i));
_logic.AddSequence(items
.Where(i => i != null)
.Distinct(ReferenceComparer <T> .Instance)
.Select(Wrap));
}
