question: public static boolean cmpList ( List < ? > l1 , List < ? > l2 ) { if ( ( l1 == null ) && ( l2 == null ) ) { return true ; } if ( ( l1 == null ) || ( l2 == null ) ) { return false ; } ArrayList < ? > cp = new ArrayList < > ( l1 ) ; for ( Object o : l2 ) { if ( ! cp . remove ( o ) ) { return false ; } } return cp . isEmpty ( ) ; }
target:  Compares lists of objects