In this example from the wiki,
GDT.addResearchItem(
{
id: "Swift Loading",
name: "Swift loading".localize(),
v: 4,
canResearch: function (company) {
return LevelCalculator.getMissionLevel('Level Design') > 5 //The 'Level Design' level has to 6 or higher
},
category: "Level Design",
categoryDisplayName: "Level Design".localize()
});
What does v: 4 mean, and why does any old number not work?