how about return child process reference?

[lifuzhao]

i use node-dev as a module in my project

// 1.js
const nodeDev = require('node-dev')
const child = nodeDev('./2.js', [], [], {
  ignore: []
})
// child is undefined
// expect
child.on('message', m => {
  // do something
})
//process.on('message', m => {
  // do something
//})

//2.js
process.send({
  message: 'hello world'
})

but i can't get child process reference forked by node-dev, so that i receive nothing;
any solution? or just return child process reference?
thanks for help!!!