code: function(filename, msg, $done) {
    var __open = _.bind(fs.open, fs, filename, 'a')
      , __write = util.partial.call(fs, fs.write, undefined, msg)
      , __close = util.partial.call(fs, fs.close)
    async.waterfall([__open, __write, __close], $done)
  }
docs: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~ Optional Garbage Collection