code: public Map<String, Boolean> getAdditionalJSReverse() {
  		Map<String, Boolean> result = new LinkedHashMap<>();
  		List<MenuEntry> parents = reverseFlattened().collect(AdminToolMenuUtils.toListReversed());
  		parents.forEach(menuEntry -> {
  			if (null != menuEntry.getAdditionalJS()) {
  				result.putAll(menuEntry.getAdditionalJS());
  			}
  		});
  		return result;
  	}
docs: returns all additional js from this to upper menu item hierarchy beginning with the root.
  
  @return
  @since 1.1.4