/**
  * Get the contour line style. Use associated <code>ContourLineAttribute</code> if it exists and
  * has styleOverrideen set to <code>false</code>.
  */
 public int getStyle() {
   if (attr_ != null && attr_.isStyleOverridden()) {
     return attr_.getStyle();
   } else {
     return super.getStyle();
   }
 }