question: public String printQueue ( ) { StringBuilder result = new StringBuilder ( ) ; result . append ( "[" ) ; LirsEntry e = queueFront ( ) ; if ( e != null ) { result . append ( e ) ; for ( e = e . nextInQueue ; e != header ; e = e . nextInQueue ) { result . append ( ", " + e ) ; } } result . append ( "]" ) ; return result . toString ( ) ; }
target:  Returns a string representation of the stack. Useful for debugging.