@ApiStatus.Internal
  public void setPopupTitle(boolean isExperimentalUI) {
    isPopup = true;
    this.isExperimentalUI = isExperimentalUI;

    if (isExperimentalUI) {
      updateDimensions();
      useHeaderInsets = true;
    }
  }
@ApiStatus.Internal
  public void setPopupTitle(boolean isExperimentalUI)