public static String all() {

		StringBuilder sb = new StringBuilder();
		for( Iterator<Level> it = Arrays.asList( LEVELS ).iterator(); it.hasNext(); ) {
			sb.append( it.next());
			if( it.hasNext())
				sb.append( ", " );
		}

		return sb.toString();
	}
public static String all ( ) { StringBuilder sb = new StringBuilder ( ) ; for ( Iterator < Level > it = Arrays . asList ( LEVELS ) . iterator ( ) ; it . hasNext ( ) ; ) { sb . append ( it . next ( ) ) ; if ( it . hasNext ( ) ) sb . append ( ", " ) ; } return sb . toString ( ) ; }
@return a non-null string listing all the possible log levels