Using Forever; how can I find out the pid of a child process?

I'm using Forever in my node.js app. I'm starting a child process like:

var forever = require('forever');

child = new (forever.Monitor)('path/to/my/server.js', {
    max: 3,
    silent: true,
    options: []
});

child.start();

How can I find out the pid of that child process?

var forever = require('forever');

child = new (forever.Monitor)('path/to/my/server.js', {
    max: 3,
    silent: true,
    options: []
});

child.on('start', function(process, data) { console.log(data.pid); });
child.start();

Listen to the 'start' event, and it's the pid property of the second argument passed to that callback function.