How to use

unwrap

method

in

brave.opentracing.BraveSpanContext

/**
 * Injects the underlying context using B3 encoding by default.
 */
@Override public <C> void inject(SpanContext spanContext, Format<C> format, C carrier) {
 Injector<TextMap> injector = formatToInjector.get(format);
 if (injector == null) {
  throw new UnsupportedOperationException(format + " not in " + formatToInjector.keySet());
 }
 TraceContext traceContext = ((BraveSpanContext) spanContext).unwrap();
 injector.inject(traceContext, (TextMap) carrier);
}

} else if ((context = reference.unwrap()) != null) {

if (receivedContext != null) {
 if (receivedContext instanceof BraveSpanContext) {
  if (((BraveSpanContext) receivedContext).unwrap() != null) {
   spanBuilder.asChildOf(receivedContext);