@Override
    public TopicStatus getTopic(String connector, String topic) {
        ConcurrentMap<String, TopicStatus> activeTopics = topics.get(Objects.requireNonNull(connector));
        return activeTopics != null ? activeTopics.get(Objects.requireNonNull(topic)) : null;
    }
An implementation of StatusBackingStore that stores statuses in-memory.
connect/runtime/src/main/java/org/apache/kafka/connect/storage/MemoryStatusBackingStore.java