missing_method:java.util.Optional#flatMap(java.util.function.Function<? super T,java.util.Optional<U>>) missing_method:java.util.OptionalDouble#orElseThrow(java.util.function.Supplier<X>) missing_method:java.util.OptionalInt#orElseThrow(java.util.function.Supplier<X>) missing_method:java.util.OptionalLong#orElseThrow(java.util.function.Supplier<X>) mismatch_method:java.util.concurrent.ConcurrentHashMap.KeySetView#removeAll(java.util.Collection<?>)