@NotNull
  @Nls
  private static String getButtonText(@NotNull MyMode currentState) {
    return MyMode.SPLIT.equals(currentState)
           ? StreamDebuggerBundle.message("stream.debugger.dialog.flat.mode.button")
           : StreamDebuggerBundle.message("stream.debugger.dialog.split.mode.button");
  }
@NotNull
  @Nls
  private static String getButtonText(@NotNull MyMode currentState)