public void UnlinkFromDescendant(TaskViewModel descendant)
{
this.SimulationDataChanged?.Invoke(this, EventArgs.Empty);
this._task.UnlinkFromDescendant(descendant._task);
this.JournalDataChanged?.Invoke(this, EventArgs.Empty);
}
public void UnlinkFromAncestor(TaskViewModel ancestor)
{
this.SimulationDataChanged?.Invoke(this, EventArgs.Empty);
this._task.UnlinkFromAncestor(ancestor._task);
this.JournalDataChanged?.Invoke(this, EventArgs.Empty);
}