public override void AppendChild(IFlowChartNode <string> node)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
node.CheckSelf();
RemoveAllChildren();
base.AppendChild(node);
}
public virtual void AppendParent(IFlowChartNode <string> node)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
node.CheckSelf();
if (_parents.Any(x => x.Id == node.Id))
{
return;
}
_parents.Add(node);
}
