default void batchWriteSpans(
        com.google.devtools.cloudtrace.v2.BatchWriteSpansRequest request,
        io.grpc.stub.StreamObserver<com.google.protobuf.Empty> responseObserver) {
      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(
          getBatchWriteSpansMethod(), responseObserver);
    }
<pre>
Batch writes new spans to new or existing traces. You cannot update
existing spans.
</pre>
java-trace/grpc-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/TraceServiceGrpc.java