docs: private synchronized void sendCurrentConfig() {
      // Bouncing back CurrentLibraryConfig to Agent.
      io.opencensus.proto.trace.v1.TraceConfig currentTraceConfigProto =
          TraceProtoUtils.getCurrentTraceConfig(traceConfig);
      CurrentLibraryConfig currentLibraryConfig =
          CurrentLibraryConfig.newBuilder().setConfig(currentTraceConfigProto).build();
      sendCurrentConfig(currentLibraryConfig);
    }