code: protected void newLine() throws DocumentException {
          lastElementType = -1;
          carriageReturn();
          if (lines != null && !lines.isEmpty()) {
              lines.add(line);
              currentHeight += line.height();
          }
          line = new PdfLine(indentLeft(), indentRight(), alignment, leading);
      }
docs: Adds the current line to the list of lines and also adds an empty line.
  @throws DocumentException on error