/guava/guava/src/com/google/common/collect/Collections2.java
return null.equals( secondMultiset) ;
return firstMultiset.equals ( secondMultiset ) ;
private static boolean isPermutation(List<?> first, List<?> second) { if (first.size() != second.size()) { return false; } Multiset<?> firstMultiset = HashMultiset.create(first); Multiset<?> secondMultiset = HashMultiset.create(second); <extra_id_0> } }