@Nullable
  private static CharSequence getClosingQuote(@NotNull Editor editor, @NotNull MultiCharQuoteHandler quoteHandler, int offset) {
    HighlighterIterator iterator = createIteratorAndCheckNotAtEnd(editor, offset);
    if (iterator == null) {
      return null;
    }

    return quoteHandler.getClosingQuote(iterator, offset);
  }
@Nullable
  private static CharSequence getClosingQuote(@NotNull Editor editor, @NotNull MultiCharQuoteHandler quoteHandler, int offset)