code: public void emitAnnotation(@Nonnull ZipkinData zipkinData, @Nonnull String key, short value) {
          ZipkinAnnotationsStore store = prepareEmission(zipkinData, key).addAnnotation(key, value);
          emitAnnotations(store);
      }
docs: Emits a single (binary) short annotation to Zipkin.
  
  @param zipkinData Zipkin request data
  @param key        The annotation key
  @param value      The annotation value