Get current filename in Babel Plugin? : <p>I'm attempting to write a plugin for babel, and am needing the filename of the current file that is being parsed.  I know the lines of the code are passed in, but I haven't managed to find a reference to the filename.  Any help??</p>

<p>For instance given this code what could I do</p>

<pre><code>export default function({ types: t }) {
  return {
    visitor: {
      Identifier(path) {
       // something here??
      }
    }
  };
}
</code></pre>
