<span class="name"><a class="deprecated" href="dart-io/Platform/packageRoot.html">packageRoot</a></span>
          <span class="signature">&#8594; <a href="dart-core/String-class.html">String</a></span>         
        </dt>
        <dd>
          This returns <code>null</code>, as <code>packages/</code> directories are no longer supported.
                  <div class="features">@<a href="dart-core/Deprecated-class.html">Deprecated</a>(&#39;packages&#47; directory resolution is not supported in Dart 2&#39