docs: public void deleteKeyspace(KeyspaceImpl keyspace) {
          Lock lock = lockManager.getLock(getLockingKey(keyspace));
          lock.lock();
          try {
              if (keyspaceCacheMap.containsKey(keyspace)) {
                  KeyspaceCacheContainer container = keyspaceCacheMap.remove(keyspace);
                  container.graph().close();
                  container.invalidateSessions();
              }
          } finally {
              lock.unlock();
          }
      }