code: public void rectangle(float x, float y, float w, float h) {
          content.append(x).append(' ').append(y).append(' ').append(w).append(' ').append(h).append(" re").append_i(separator);
      }
docs: Adds a rectangle to the current path.
  
  @param       x       x-coordinate of the starting point
  @param       y       y-coordinate of the starting point
  @param       w       width
  @param       h       height