protected void AddParent(Identity identity)
{
var parentItem = _workflow.FindWorkflowItemBy(identity);
if (parentItem == null)
{
throw new ParentItemMissingException(string.Format(Resources.Schedulable_item_missing, identity));
}
if (Equals(parentItem))
{
throw new CyclicDependencyException(string.Format(Resources.Cyclic_dependency, identity));
}
_parentItems.Add(parentItem);
}
