@Override
    @ManagedOperation(description = "Remove the key from the store")
    public boolean remove(String key) {
        cache.invalidate(key);
        return true;
    }
@Test
    void testRemove() {
        // add key to remove
        assertTrue(repo.add(key01));
        assertTrue(repo.add(key02));
        assertTrue(repo.getCache().asMap().containsKey(key01));
        assertTrue(repo.getCache().asMap().containsKey(key02));

        // clear repo
        repo.clear();
        assertFalse(repo.getCache().asMap().containsKey(key01));
        assertFalse(repo.getCache().asMap().containsKey(key02));
    }