@Override
	public boolean containsKey(Object key) {
		return store.safe(lock.readLock(), () -> store.keys.contains(key, keySpan));
	}
This is the sub-ranged form of {@link DBCachedObjectStoreMap}

<p>
For example, this can be obtained via {@code store.asMap().subMap(...)}.

@param <T> the type of objects in the store
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/util/database/DBCachedObjectStoreSubMap.java