@Override
    public Map<K, V> getAll(Set<K> keys) {
        return map.getAll(keys);
    }
@Test
    public void testGetAll() {
        map.put(23, "value-23");
        map.put(42, "value-42");

        Map<Integer, String> expectedResult = new HashMap<>();
        expectedResult.put(23, "value-23");
        expectedResult.put(42, "value-42");

        Map<Integer, String> result = adapter.getAll(expectedResult.keySet());
        assertEquals(expectedResult, result);
    }