code: function handleStream (file, encoding, cb) {
  
    let config = '';
  
    file.contents.on('data', chunk => {
      config += chunk;
    });
  
    file.contents.on('end', () => {
      config = configParser(config);
      holograph.holograph(config);
      return cb(null, file);
    });
  
  }
docs: Run Hologram when given a stream.
  
  @param {Object} file A Vinyl file.
  @param {String} encoding The file encoding.
  @param {Function} cb Called after hologram has run.
  @returns {Function} Executed callback.