code: function createMetaRecordStream(metaFilePaths, types) {
    const metaRecordStream = combinedStream.create();
  
    metaFilePaths.forEach((metaFilePath) => {
      metaRecordStream.append( (next) => {
        logger.info( `Loading ${path.basename(metaFilePath)} records from ${path.dirname(metaFilePath)}` );
        next(createOneMetaRecordStream(metaFilePath));
      });
    });
  
    return metaRecordStream;
  }
docs: /*
  given a list of meta file paths, create a combined stream that reads all the
  records via the csv parser