Check isSet values (null, "", [], undefined)
const a = ""sb.isSet(a)
-> false
sb.isEmpty && sb.get combination:
const a = { a: [ { a: [1, 2, 3] } ], b: 4}​​sb.isSet(sb.get(a, 'a.0.a.1'))
-> true
sb.isEmpty(sb.get(a, 'a.0.b.1'))
sb.isSet(sb.get(a, 'a.0.b.1'))