private @NotNull String dumpCreationTraces(@NotNull FileElement fileElement) {
    @NonNls StringBuilder traces = new StringBuilder("\nNow " + Thread.currentThread() + "\n");
    traces.append("My creation trace:\n").append(getUserData(CREATION_TRACE));
    traces.append("AST creation traces:\n");
    fileElement.acceptTree(new RecursiveTreeElementWalkingVisitor(false) {
      @Override
      public void visitComposite(CompositeElement composite) {
        PsiElement psi = composite.getPsi();
        if (psi != null) {
          traces.append(psi).append("@").append(System.identityHashCode(psi)).append("\n");
          String trace = psi.getUserData(CREATION_TRACE);
          if (trace != null) {
            traces.append(trace).append("\n");
          }
        }
        super.visitComposite(composite);
      }
    });
    return traces.toString();
  }
private @NotNull String dumpCreationTraces(@NotNull FileElement fileElement)