public SecretStore load(SecureConfig secureConfig) {
        return doIt(MODE.LOAD, secureConfig);
    }
@Test
    public void testAlternativeImplementation() {
        SecureConfig secureConfig = new SecureConfig();
        secureConfig.add("keystore.classname", "org.logstash.secret.store.SecretStoreFactoryTest$MemoryStore".toCharArray());
        SecretStore secretStore = secretStoreFactory.load(secureConfig);
        assertThat(secretStore).isInstanceOf(MemoryStore.class);
        validateMarker(secretStore);
    }