output: #fixed code
                                  public void cacheInterceptor(String cacheName, Long timeToLive, List<String> headers, List<String> queryParams) {
  
          RedissonClient redisson = (RedissonClient) BeanManager.getBean(RedissonClient.class);
  
          RequestContext context = RequestContext.getCurrentContext();
  
          if (shouldCache(context, headers, queryParams)) {
              RBucket<ApiResponse> rBucket = redisson.getBucket(createCacheKey(context, cacheName, headers, queryParams));
  
              if (rBucket.get() == null) {
                  context.put(CACHE_BUCKET, rBucket);
                  context.put(CACHE_TIME_TO_LIVE, timeToLive);
              } else {
                  ApiResponse response = rBucket.get();
  
                  helper.call().response().header().addAll(response.getHeaders());
                  helper.call().response().setBody(response.getBody());
                  helper.call().response().setStatus(response.getStatus());
              }
          }
      }
input: #vulnerable code 
                                  public void cacheInterceptor(String cacheName, Long timeToLive, List<String> headers, List<String> queryParams) {
  
          Helper helper = new HelperImpl();
  
          RedissonClient redisson = (RedissonClient) BeanManager.getBean(RedissonClient.class);
  
          RequestContext context = RequestContext.getCurrentContext();
  
          if (shouldCache(context, headers, queryParams)) {
              RBucket<ApiResponse> rBucket = redisson.getBucket(createCacheKey(context, cacheName, headers, queryParams));
  
              if (rBucket.get() == null) {
                  context.put(CACHE_BUCKET, rBucket);
                  context.put(CACHE_TIME_TO_LIVE, timeToLive);
              } else {
                  ApiResponse response = rBucket.get();
  
                  helper.call().response().header().addAll(response.getHeaders());
                  helper.call().response().setBody(response.getBody());
                  helper.call().response().setStatus(response.getStatus());
              }
          }
      } 
                              #location 18 
                              #vulnerability type NULL_DEREFERENCE