public ImmutableArray <string> GetUnfinishedLeafTasks()
{
IList <Allocation> allUnfinished = GetUnfinishedAllocations();
ISet <Allocation> unfinishedLeaves = new LinkedHashSet <Allocation>(allUnfinished); // preserves order
foreach (Allocation allocation in allUnfinished)
{
Maybe <Allocation> parent = allocation.GetParent();
while (parent.IsPresent())
{
unfinishedLeaves.Remove(parent.Get());
parent = parent.Get().GetParent();
}
}
return(ImmutableArray.CreateRange(
unfinishedLeaves.Select(a => a.GetDescription()).ToList()));
}