code: public static TinMapSharedConstants create() {
      if (tinMapConstants == null) { // NOPMD it's thread save!
        synchronized (TinMapConstantsImpl.class) {
          if (tinMapConstants == null) {
            tinMapConstants =
                new TinMapConstantsImpl(readMapFromProperties("TinMapConstants", "tins"));
          }
        }
      }
      return tinMapConstants;
    }
docs: Instantiates a class via deferred binding.
  
  @return the new instance, which must be cast to the requested class