@TestOnly
  public void checkAllTreesEqual() {
    Collection<PsiFileImpl> roots = myRoots.values();
    PsiDocumentManager documentManager = PsiDocumentManager.getInstance(getManager().getProject());
    documentManager.commitAllDocuments();
    for (PsiFile root : roots) {
      Document document = documentManager.getDocument(root);
      assert document != null;
      PsiDocumentManagerBase.checkConsistency(root, document);
      assert root.getText().equals(document.getText());
    }
  }
@TestOnly
  public void checkAllTreesEqual()