inline fun <T> Tracer.scopedSpan(name: String, block: Tracer.() -> T): T
Kotlin friendly syntax for start/finish brave.ScopedSpan
Normally, brave needs to call start/finish like this
Tracer.startScopedSpan("DB Access")
// do whatever we want to trace
span.finish()
Now, this method helps us write like this
span.use("DB Access") {
// do whatever we want to trace
}