Currently there are no methods to turn on/off the visibility of elements/nested cells contained within a cell via a boolean constraint. In many cases this would be a useful feature to have, to avoid having to recreate all the possible permutations of a component as separate cells. For example equipment supplied by a manufacturer may come with 5 different add-on modules that can be specified; rather than creating every possible combination of these (over 100 possibilities in this case)we could simply have a checkbox to activate the visibility of each component within the cell, and achieve the same result with just 1 cell.