BraveTracer(Builder b) { brave4 = b.tracing.tracer(); scopeManager = new BraveScopeManager(b.tracing); for (Map.Entry<Format<TextMap>, Propagation<String>> entry : b.formatToPropagation.entrySet()) { formatToInjector.put(entry.getKey(), entry.getValue().injector(TEXT_MAP_SETTER)); formatToExtractor.put(entry.getKey(), new TextMapExtractorAdaptor(entry.getValue())); } }