def METHOD_NAME(
    subscriber_builder: Callable[[Mapping[str, Any]], Subscriber],
) -> None:
    subscriber = subscriber_builder(
        {
            CUR_SUBSCRIBER_REF: "current_sha",
            CUR_CONFIG_HASHES: [
                ConfigHash(
                    channel="channel-b",
                    parent_saas="saas-b",
                    target_config_hash="hash-b",
                ),
            ],
            DESIRED_REF: "current_sha",
            DESIRED_TARGET_HASHES: [
                ConfigHash(
                    channel="channel-a",
                    parent_saas="saas-a",
                    target_config_hash="hash-a",
                ),
                ConfigHash(
                    channel="channel-b",
                    parent_saas="saas-b",
                    target_config_hash="hash-b",
                ),
            ],
        }
    )
    assert subscriber.has_diff()