public virtual void Expand()
{
if (!Collapsible)
{
return;
}
setExpanded(true);
foreach (var relatedItemNode in Destinations.Cast <GoObject>().Where(obj => obj != this).OfType <RelatedItemNode>())
{
setVisibility(relatedItemNode, visible: true);
setSourceLinkVisibility(relatedItemNode, visible: true);
}
}