code: function convertData(inPath, outPath, opts_, cb) {
    if (typeof cb === 'undefined') {
      cb = opts_;
    }
    readData(inPath, function (error, jsonData) {
      if (error) {
        cb(error);
      } else {
        writeData(outPath, jsonData, opts_, cb);
      }
    });
  }
docs: Reads in data given a path ending in the file format with {@link readData} and writes to file using {@link writeData}. A convenience function for converting files to more other formats. All formats can convert to all others except you can't convert object-only formats such as aml or yaml files that are not lists into tabular formats, which must be lists.
  
  @function convertData
  @param {String} inFilePath Input file path
  @param {String} outFilePath Output file path
  @param {Object} [options] Optional config object that's passed to {@link writeData}. See that documentation for full options, which vary depending on the output format you choose.
  @param {Function} callback Has signature `(err, dataStr)`. `dataStr` is the data that was written out as a string
  
  @example
  io.convertData('path/to/data.dbf', 'path/to/data.csv', function (err, dataStr) {
  console.log(err)
  })
  
  io.convertData('path/to/data.tsv', 'path/to/create/to/data.dbf', {makeDirectories: true}, function (err, dataStr) {
  console.log(err)
  })