@Override
    public boolean contains(Object mapEntry) {
        if (records == null) {
            return false;
        }

        Data keyData = ((QueryableEntry) mapEntry).getKeyData();
        return records.containsKey(keyData);
    }
@Test
    public void testContains_notEmpty() {
        QueryableEntry entry = entry(data());
        addEntry(entry);

        assertThat(result.contains(entry)).isTrue();
    }