Template:Navlist/Link subpages
Usage
editTakes one optional unnamed parameter. Interprets the parameter as a series of possible names of subpages of the transcluding page, separated by "/". Produces a vertical stack of links to any of the subpages that exist, using {{Navlist/Link subpage}} and {{Navlist/Vertical stack}}. Up to three subpages are currently checked; if more than three are provided, any beyond the first three are discarded.