private static int CombineNewRegionsIntoContiguousGroups2(RegionAndRoomUpdater __instance)
{
int num = 0;
for (int i = 0; i < newRegions(__instance).Count; i++)
{
if (newRegions(__instance)[i].newRegionGroupIndex < 0)
{
RegionTraverser.FloodAndSetNewRegionIndex(newRegions(__instance)[i], num);
num++;
}
}
return(num);
}