#vulnerable code 
                                private Driver driverWithPool( ConnectionPool pool )
    {
        Logging logging = DEV_NULL_LOGGING;
        RoutingSettings settings = new RoutingSettings( 10, 5_000, null );
        AsyncConnectionPool asyncConnectionPool = mock( AsyncConnectionPool.class );
        LoadBalancingStrategy loadBalancingStrategy = new LeastConnectedLoadBalancingStrategy( pool,
                asyncConnectionPool, logging );
        ConnectionProvider connectionProvider = new LoadBalancer( SEED, settings, pool, asyncConnectionPool,
                GlobalEventExecutor.INSTANCE, clock, logging, loadBalancingStrategy );
        Config config = Config.build().withLogging( logging ).toConfig();
        SessionFactory sessionFactory = new NetworkSessionWithAddressFactory( connectionProvider, config );
        return new InternalDriver( insecure(), sessionFactory, logging );
    } 
                            #location 11 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                private Driver driverWithPool( ConnectionPool pool )
    {
        Logging logging = DEV_NULL_LOGGING;
        RoutingSettings settings = new RoutingSettings( 10, 5_000, null );
        AsyncConnectionPool asyncConnectionPool = mock( AsyncConnectionPool.class );
        when( asyncConnectionPool.close() ).thenReturn( completedFuture( null ) );
        LoadBalancingStrategy loadBalancingStrategy = new LeastConnectedLoadBalancingStrategy( pool,
                asyncConnectionPool, logging );
        ConnectionProvider connectionProvider = new LoadBalancer( SEED, settings, pool, asyncConnectionPool,
                GlobalEventExecutor.INSTANCE, clock, logging, loadBalancingStrategy );
        Config config = Config.build().withLogging( logging ).toConfig();
        SessionFactory sessionFactory = new NetworkSessionWithAddressFactory( connectionProvider, config );
        return new InternalDriver( insecure(), sessionFactory, logging );
    }