Span
final case class Span(displayName: Option[TruncatableString], timeEvents: Option[TimeEvents], name: Option[String], startTime: Option[String], spanId: Option[String], stackTrace: Option[StackTrace], attributes: Option[Attributes], endTime: Option[String], links: Option[Links], status: Option[Status], childSpanCount: Option[Int], sameProcessAsParentSpan: Option[Boolean], spanKind: Option["SPAN_KIND_UNSPECIFIED" | "INTERNAL" | "SERVER" | "CLIENT" | "PRODUCER" | "CONSUMER"], parentSpanId: Option[String])