/guava/guava/src/com/google/common/collect/FilteredEntryMultimap.java
return Collections2.filter( predicate, collection) ;
return Collections2.filter ( collection, predicate ) ;
} static <E extends @Nullable Object> Collection<E> filterCollection( Collection<E> collection, Predicate<? super E> predicate) { if (collection instanceof Set) { return Sets.filter((Set<E>) collection, predicate); } else { <extra_id_0> } } @Override public boolean containsKey(@CheckForNull Object key) { return asMap().get(key) != null; }