We have not, and it's because we do our best, in terms of how we define the navy's requirement, not to prescribe a solution to industry. As much as possible, we have a performance requirement specifying that the ship must be capable of doing this, to this extent, and to this success level. If an industry bidder believes the solution to deliver that is something that involves modularity, then they can pitch that as their solution, and it competes against other solutions that deliver it some other way.
We do our best not to tell industry how to deliver our requirement. We just state the requirement.