节点。你能在流中使用异步函数吗?

Consider the following:

考虑以下:

var asyncFunction = function(data, callback) {
  doAsyncyThing(function(data){
    // do some stuff
    return callback(err)
  })
}
fs.createReadStream('eupmc_lite_metadata_2016_04_15.json')
  .pipe(JSONstream.parse())
  .on('data', asyncFunction)   // <- how to let asyncFunction complete before continuing
var asyncFunc