Method retainAll

output/java_guava/1.4.19/Maps.java:3076–3081

(Collection<?> c)

        }

        @Override
        public boolean retainAll(Collection<?> c) {
          return Iterators.removeIf(
            unfiltered.entrySet().iterator(),
            Predicates.<Entry<K, V>>and(entryPredicate, Maps.<K>keyPredicateOnEntries(not(in(c)))));
        }
      };
    }