//****
// Foliate
//****
opts = {
'start': 1,
'method': 'foliate',
'frontLabel': 'r',
'backLabel': 'v',
'startWith': 'front',
'unitLabel': '',
'bracket': false
}
var gen = mod.pageLabelGenerator( opts )
console.log(gen.next().value)
console.log(gen.next().value)
console.log(gen.next().value)
console.log(gen.next().value)