public @NotNull TextWithMnemonic withMnemonicIndex(int index) {
    if (index == mnemonicIndex) return this;
    if (index >= -1) {
      String text = getText();
      if (index == -1) return fromPlainText(text);
      if (index < text.length() - getEllipsisLength(text)) return fromPlainTextWithIndex(text, index);
    }
    throw new IndexOutOfBoundsException(String.valueOf(index));
  }
public @NotNull TextWithMnemonic withMnemonicIndex(int index)