/guava/android/guava/src/com/google/common/collect/Multisets.java
checkNotNull( elements) ;checkNotNull( self) ;
checkNotNull ( self ) ;
return true; } return false; } static <E extends @Nullable Object> boolean addAllImpl( Multiset<E> self, Collection<? extends E> elements) { <extra_id_0> checkNotNull(elements); if (elements instanceof Multiset) { return addAllImpl(self, cast(elements)); } else if (elements.isEmpty()) { return false; } else {