@Override
  public void uninstallPackages(List<? extends InstalledPackage> installedPackages, @NotNull Listener listener) {
    final String packageName = installedPackages.size() == 1 ? installedPackages.get(0).getName() : null;
    final PyPackageManagerUI ui = new PyPackageManagerUI(myProject, mySdk, new PyPackageManagerUI.Listener() {
      @Override
      public void started() {
        listener.operationStarted(packageName);
      }

      @Override
      public void finished(List<ExecutionException> exceptions) {
        listener.operationFinished(packageName, toErrorDescription(exceptions, mySdk));
      }
    });

    final List<PyPackage> pyPackages = new ArrayList<>();
    for (InstalledPackage aPackage : installedPackages) {
      if (aPackage instanceof PyPackage) {
        pyPackages.add((PyPackage)aPackage);
      }
    }
    ui.uninstall(pyPackages);
  }
@Override
  public void uninstallPackages(List<? extends InstalledPackage> installedPackages, @NotNull Listener listener)