docs: public String button(String href, String target, String image, String label, int type, boolean useCustomImage) {
  
          if (useCustomImage) {
              // search the picture in the "custom pics" folder
              return button(href, target, image, label, type, getPicsUri());
          } else {
              // search the picture in the common "buttons" folder
              return button(href, target, image, label, type);
          }
      }