public UnaryCallSettings.Builder<BatchWriteSpansRequest, Empty> batchWriteSpansSettings() {
      return getStubSettingsBuilder().batchWriteSpansSettings();
    }
Returns the builder for the settings used for calls to batchWriteSpans.
java-trace/google-cloud-trace/src/main/java/com/google/cloud/trace/v2/TraceServiceSettings.java