How to use the apollo-engine-reporting-protobuf.FullTracesReport.verify function in apollo-engine-reporting-protobuf

const report = this.reports[schemaHash];
    this.resetReport(schemaHash);

    if (Object.keys(report.tracesPerQuery).length === 0) {
      return;
    }

    // Send traces asynchronously, so that (eg) addTrace inside a resolver
    // doesn't block on it.
    await Promise.resolve();

    if (this.options.debugPrintReports) {
      console.log(`Engine sending report: ${JSON.stringify(report.toJSON())}`);
    }

    const protobufError = FullTracesReport.verify(report);
    if (protobufError) {
      throw new Error(`Error encoding report: ${protobufError}`);
    }
    const message = FullTracesReport.encode(report).finish();

    const compressed = await new Promise((resolve, reject) => {
      // The protobuf library gives us a Uint8Array. Node 8's zlib lets us
      // pass it directly; convert for the sake of Node 6. (No support right
      // now for Node 4, which lacks Buffer.from.)
      const messageBuffer = Buffer.from(
        message.buffer as ArrayBuffer,
        message.byteOffset,
        message.byteLength,
      );
      gzip(messageBuffer, (err, gzipResult) => {
        if (err) {