public List<String> messageSources() {
        if (null == _messageSources) {
            _messageSources = Arrays.asList(get(I18N_MESSAGE_SOURCES).toString().split("[, \\t]+"));
        }
        return _messageSources;
    }
public List < String > messageSources ( ) { if ( null == _messageSources ) { _messageSources = Arrays . asList ( get ( I18N_MESSAGE_SOURCES ) . toString ( ) . split ( "[, \\t]+" ) ) ; } return _messageSources ; }
Get {@link RythmConfigurationKey#I18N_MESSAGE_SOURCES} without lookup