in elitzur-avro/src/main/scala/com/spotify/elitzur/converters/avro/AvroConverter.scala [173:179]
override def fromAvro(v: Any, schema: Schema, doc: Option[String] = None)
: ValidationStatus[Option[T]] = {
Unvalidated(v match {
case null => Option.empty[T]
case _ => Option(implicitly[AvroConverter[T]].fromAvro(v, schema, doc))
})
}