conf.logger.warning( "CONFIGURATION: no value found for key " + key );
conf.warning( "CONFIGURATION: no value found for key " + key );
    public static String valueFor( String key ) {        Configuration conf = instance();        String val = conf.properties.getProperty( key );        if ( val == null ) {            conf.logger.warning( "CONFIGURATION: no value found for key " + key );        }        return val;    }