code: function startPackage(package, cb) {
     if (isUndefined(packageRuntimes[package.packageName])) {
        packageRuntimes[package.packageName] = {};
     }
  
     var packageRuntime = packageRuntimes[package.packageName];
  
     if (!isUndefined(packageRuntime.process)) {
        cb(new Error('package already running'));
        return;
     }
  
     packageRuntime.startupTimer = setTimeout(function() { 
        packageRuntime.startupTimer = null;
        cb();
     }, startupTimout * 1000);
  
     packageRuntime.process = exec(package.launchCommand, { cwd: (!isUndefined(package.workingDirectory) ? path.resolve(package.workingDirectory) : undefined) }, function(err) {
        packageRuntime.process = null;
        if (!isUndefined(packageRuntime.startupTimer)) {
           clearTimeout(packageRuntime.startupTimer);
           packageRuntime.startupTimer = null;
           cb(err);
        } else if (!isUndefined(packageRuntime.killTimer)) {
           clearTimeout(packageRuntime.killTimer);
           packageRuntime.killTimer = null;
           packageRuntime.killedCallback();
           packageRuntime.killedCallback = null;
        }
     });
  }
docs: Private function to start installed package