@Override
    public void actionPerformed(@NotNull AnActionEvent e) {
      final TypeMigrationUsageInfo[] usages = getUsages(e);
      assert usages != null;
      for (TypeMigrationUsageInfo usageInfo : usages) {
        processUsage(usageInfo);
      }
      myRootsTree.repaint();
    }
@Override
    public void actionPerformed(@NotNull AnActionEvent e)