code: public String get(String key) {
          try {
              Field field;
              field = this.getClass().getField(key);
              return (String) field.get(this);
          } catch(NoSuchFieldException e) {
              return (String) antifraud_info.get(key);
          } catch(IllegalAccessException e) {
              return "";
          }
      }
docs: Helper method to access line item fields