@Override
  public @NotNull ActionCallback selectAndFocus(final @Nullable Content content, boolean requestFocus, final boolean forced, boolean implicit) {
    if (content == null) return ActionCallback.REJECTED;
    return getContentManager(content).setSelectedContent(content, requestFocus || shouldRequestFocus(), forced, implicit);
  }
@Override
  public @NotNull ActionCallback selectAndFocus(final @Nullable Content content, boolean requestFocus, final boolean forced, boolean implicit)