How to use the apollo-engine-reporting-protobuf.Trace.decode function in apollo-engine-reporting-protobuf

let traceBuffer: Buffer | undefined;
        let traceParsingFailed = false;
        try {
          // XXX support non-Node implementations by using Uint8Array? protobufjs
          // supports that, but there's not a no-deps base64 implementation.
          traceBuffer = Buffer.from(traceBase64, 'base64');
        } catch (err) {
          console.error(
            `error decoding base64 for federated trace from ${fetch.serviceName}: ${err}`,
          );
          traceParsingFailed = true;
        }

        if (traceBuffer) {
          try {
            const trace = Trace.decode(traceBuffer);
            traceNode.trace = trace;
          } catch (err) {
            console.error(
              `error decoding protobuf for federated trace from ${fetch.serviceName}: ${err}`,
            );
            traceParsingFailed = true;
          }
        }
        traceNode.traceParsingFailed = traceParsingFailed;
      }
    }

    return response.data;
  }
}