/guava/guava/src/com/google/common/collect/Multisets.java
if ( elements.isEmpty ( ) ) { return false; }
} else { return Iterators.addAll(self, elements.iterator()); } } private static <E extends @Nullable Object> boolean addAllImpl( Multiset<E> self, Multiset<? extends E> elements) { <extra_id_0> elements.forEachEntry(self::add); return true; } static boolean removeAllImpl(Multiset<?> self, Collection<?> elementsToRemove) { Collection<?> collection = (elementsToRemove instanceof Multiset)