code: public Set<String> getCustomBundlePropertyAsSet(String bundleName, String key) {
  		Set<String> propertiesSet = new HashSet<>();
  		StringTokenizer tk = new StringTokenizer(getCustomBundleProperty(bundleName, key, ""), ",");
  		while (tk.hasMoreTokens())
  			propertiesSet.add(tk.nextToken().trim());
  		return propertiesSet;
  	}
docs: Returns as a set, the comma separated values of a property
  
  @param bundleName
  the bundle name
  @param key
  the key of the property
  @return a set of the comma separated values of a property