code: public void setSsf(Integer id, String ssf) {
          if (id < 1 || id > 25)
              throw new IllegalStateException("Site specific factor must be between 1 and 25.");
  
          setInput(INPUT_SSF_PREFIX + id, ssf);
      }
docs: Set the specified input site-specific factor
  @param id site-specific factor number
  @param ssf site-specfic factor value