public Object extract(Object target, String attributeName, Object metadata) {
        return extract(target, attributeName, metadata, true);
    }
@Test
    public void when_extractExtractor_then_correctValue() {
        // GIVEN
        AttributeConfig config
                = new AttributeConfig("gimmePower", "com.hazelcast.query.impl.getters.ExtractorsTest$PowerExtractor");
        Extractors extractors = createExtractors(config);

        // WHEN
        Object power = extractors.extract(bond, "gimmePower", null);

        // THEN
        assertThat((Integer) power).isEqualTo(550);
    }