code: public static List<String> complementaryPyCcLib() throws IOException {
  		if (complementaryLibs == null) {
  			complementaryLibs = new LinkedList<String>();
  			InputStream inputStream = API.class.getClassLoader().getResourceAsStream(FILE);
  			PropertyResourceBundle labels = new PropertyResourceBundle(inputStream);
  			Enumeration<String> bundleKeys = labels.getKeys();
  			while (bundleKeys.hasMoreElements()) {
  				String key;
  				if (KEY.equals(key = bundleKeys.nextElement())) {
  					String value = labels.getString(key);
  					if (value != null && !value.isEmpty()) {
  						String[] values = value.split(",");
  						for (String v : values) {
  							complementaryLibs.add(v.trim());
  						}
  					}
  				}
  			}
  		}
  		return complementaryLibs;
  	}
docs: <p>
  complementaryPyCcLib.
  </p>
  
  @return a {@link java.util.List} object.
  @throws java.io.IOException
  if any.