#vulnerable code 
                                L1Cache cacheL1() {
        L1Cache cache = null;
        final Class<?> componentCls = this.l1Config.getComponent();
        if (Objects.nonNull(componentCls) && Ut.isImplement(componentCls, L1Cache.class)) {
            /*
             * L1 cache here
             */
            final Class<?> cacheClass = this.l1Config.getComponent();
            cache = Fn.poolThread(POOL_L1, () -> Ut.instance(cacheClass));
            cache.bind(this.vertx).bind(this.l1Config.copy());
        }
        return cache;
    } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                L1Cache cacheL1() {
        L1Cache cache = null;
        final Class<?> componentCls = this.l1Config.getComponent();
        if (Objects.nonNull(componentCls) && Ut.isImplement(componentCls, L1Cache.class)) {
            /*
             * L1 cache here
             */
            final Class<?> cacheClass = this.l1Config.getComponent();
            cache = Fn.poolThread(POOL_L1, () -> {
                final L1Cache created = Ut.instance(cacheClass);
                return created.bind(this.vertx).bind(this.l1Config.copy());
            });
        }
        return cache;
    }