title: Can I get the dependency tree before webpack starts to build?
body: <p>Does webpack expose the dependency tree before the build is sealed? I have searched all through the compiler instance, but have found nothing about a dependency tree. It seems that there should be one hidden in that object somewhere, because webpack has to know what this tree is in order to later output the stats.json.</p>
  
  <p>I've tried using the <code>dependency-tree</code> npm package, but it doesn't support some things I have in my webpack config, so the tree is incomplete.</p>