code: private float remainingLinesHeight() {
          if (lines.isEmpty()) return 0;
          float result = 0;
          int size = lines.size();
          PdfLine line;
          for (int i = 0; i < size; i++) {
              line = (PdfLine) lines.get(i);
              result += line.height();
          }
          return result;
      }
docs: Returns the total height of all the lines in the cell.
  
  @return	a value