code: public void setTickLabelOrientation(final TickLabelOrientation ORIENTATION) {
          if (null == tickLabelOrientation) {
              _tickLabelOrientation = null == ORIENTATION ? TickLabelOrientation.HORIZONTAL : ORIENTATION;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              tickLabelOrientation.set(ORIENTATION);
          }
      }
docs: Defines the orientation of the ticklabels. The values are
  HORIZONTAL, ORTHOGONAL and TANGENT. Especially the ORTHOGONAL
  setting can be useful when using scales with big numbers.
  
  @param ORIENTATION