private TaskState Pickup(Dwarf d, float dt)
{
WorldObject m = d.GetActionbuilding().WithdrawWorldObject(d.GetActionMapElementType(), d.GetActionLevel());
if (m == null)
return TaskState.Fail;
d.CarryWorldObject(m);
d.SetActionBuilding(d.GetPrevActionBuilding());
return TaskState.Success;
}