question: public String toString ( final String name , final String header ) { final Map < String , Integer > items = contents . get ( name ) ; final StringBuilder sb = new StringBuilder ( header + "\n" ) ; for ( final Entry < String , Integer > entry : items . entrySet ( ) ) { sb . append ( entry . getKey ( ) + " \t" + entry . getValue ( ) + "\n" ) ; } return sb . toString ( ) ; }
target:  converts a shop into a human readable form