code: public void transform(AffineTransform af) {
          double arr[] = new double[6];
          af.getMatrix(arr);
          content.append(arr[0]).append(' ').append(arr[1]).append(' ').append(arr[2]).append(' ');
          content.append(arr[3]).append(' ').append(arr[4]).append(' ').append(arr[5]).append(" cm").append_i(separator);
      }
docs: Concatenates a transformation to the current transformation
  matrix.
  @param af the transformation