Class java.util.stream.Collectors

Added Methods
(Collector<T, ?, R>) filtering(Predicate<?, super, T>, Collector<?, super, T, A, R>)
(Collector<T, ?, R>) flatMapping(Function<?, super, T, Stream<?, extends, U>>, Collector<?, super, U, A, R>)
(Collector<T, ?, List<T>>) toUnmodifiableList()
(Collector<T, ?, Map<K, U>>) toUnmodifiableMap(Function<?, super, T, ?, extends, K>, Function<?, super, T, ?, extends, U>)
(Collector<T, ?, Map<K, U>>) toUnmodifiableMap(Function<?, super, T, ?, extends, K>, Function<?, super, T, ?, extends, U>, BinaryOperator<U>)
(Collector<T, ?, Set<T>>) toUnmodifiableSet()

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