Procs
- proc asString(a: Value): Option[string] {. raises: [], tags: [].}
- proc asInt(a: Value): Option[int] {. raises: [], tags: [].}
- proc asFloat(a: Value): Option[float64] {. raises: [], tags: [].}
- proc asBool(a: Value): Option[bool] {. raises: [], tags: [].}
- proc asStrings(a: Value): Option[seq[string]] {. raises: [], tags: [].}
- proc asInts(a: Value): Option[seq[int]] {. raises: [], tags: [].}
- proc asFloats(a: Value): Option[seq[float64]] {. raises: [], tags: [].}