output: #fixed code
                                  @Override
      public String get(String key) {
          return Jboot.getCache().get(cache_name, key);
      }
input: #vulnerable code 
                                  @Override
      public String get(String key) {
          return Jboot.getJbootCache().get(cache_name, key);
      } 
                              #location 3 
                              #vulnerability type NULL_DEREFERENCE