/guava/android/guava/src/com/google/common/collect/ConcurrentHashMultiset.java
return object != null && Collections2.safeRemove( null , object) ;
return object != null && Collections2.safeContains ( delegate, object ) ;
@Override protected Set<E> delegate() { return delegate; } @Override public boolean contains(@CheckForNull Object object) { <extra_id_0> } @Override public boolean containsAll(Collection<?> collection) { return standardContainsAll(collection); } @Override