Main
HappyPack
  webpack
  HappyLoader
  HappyPlugin
  HappyThreadPool
  HappyThread
  HappyThread
  HappyThread
  HappyFSCache
  FileSystem
  HappyWorkerChannel
  HappyWorker
    webpack-loader
    webpack-loader
    webpack-loader
  RunOptionsFile
    loaders
    compiler options