protected final void removeLines(int startLine, int endLine) {
    final List<Substring> lines = myOriginalDocString.getLines();
    final int startOffset = lines.get(startLine).getStartOffset();
    final int endOffset = endLine < lines.size() ? lines.get(endLine).getStartOffset() : lines.get(endLine - 1).getEndOffset();
    remove(startOffset, endOffset);
  }
protected final void removeLines(int startLine, int endLine)