docs: function(elm, win, fix) {
  		var res = null;
  		var att = elm.getAttribute(fix);
  		if (gui.Type.isString(att) && !att.startsWith("[")) {
  			if (att !== "") {
  				res = gui.Object.lookup(att, win);
  				if(!res) {
  					console.error(att + " is not defined.");
  				}
  			} else {
  				res = false; // strange return value implies no spirit for empty string
  			}
  		}
  		return res;
  	}