private static StringBuilder createNewLeafChars(final ASTNode leafElement, final TextRange textRange, final String whiteSpace) {
    final TextRange elementRange = leafElement.getTextRange();
    final String elementText = leafElement.getText();

    final StringBuilder result = new StringBuilder();

    if (elementRange.getStartOffset() < textRange.getStartOffset()) {
      result.append(elementText, 0, textRange.getStartOffset() - elementRange.getStartOffset());
    }

    result.append(whiteSpace);

    if (elementRange.getEndOffset() > textRange.getEndOffset()) {
      result.append(elementText.substring(textRange.getEndOffset() - elementRange.getStartOffset()));
    }

    return result;
  }
private static StringBuilder createNewLeafChars(final ASTNode leafElement, final TextRange textRange, final String whiteSpace)