docs: private static TraceServiceGrpc.TraceServiceStub getTraceServiceStub(
        String endPoint, Boolean useInsecure, SslContext sslContext) {
      ManagedChannelBuilder<?> channelBuilder;
      if (useInsecure) {
        channelBuilder = ManagedChannelBuilder.forTarget(endPoint).usePlaintext();
      } else {
        channelBuilder =
            NettyChannelBuilder.forTarget(endPoint)
                .negotiationType(NegotiationType.TLS)
                .sslContext(sslContext);
      }
      ManagedChannel channel = channelBuilder.build();
      return TraceServiceGrpc.newStub(channel);
    }