in geronimo-opentracing-common/src/main/java/org/apache/geronimo/microprofile/opentracing/common/microprofile/zipkin/ZipkinConverter.java [73:79]
public void onEvent(final FinishedSpan finishedSpan) {
final Span from = finishedSpan.getSpan();
if (!SpanImpl.class.isInstance(from)) {
throw new IllegalStateException("Unsupported span type: " + from + ", maybe check your configuration");
}
zipkinSpanEvent.fire(toZipkin(SpanImpl.class.cast(from)));
}