docs: public void openExample( Object o ) {
  		if (o instanceof PathLabel) {
  			PathLabel p = (PathLabel)o;
  			if( p.path.length == 1 )
  				openFile(new File(p.path[0]));
  			else {
  //				openFile(new File(p.path[0]));
  				openImageSet(p.path);
  			}
  		} else if (o instanceof String) {
  			openFile(new File((String) o));
  		} else {
  			throw new IllegalArgumentException("Unknown example object type.  Please override openExample()");
  		}
  	}