code: public static BinaryAnnotationMappingDeriver getInstance(String path) {
          if (instance == null) {
              synchronized (LOCK) {
                  if (instance == null) {
                      instance = path == null ? new BinaryAnnotationMappingDeriver() :
                              new BinaryAnnotationMappingDeriver(path);
                  }
              }
          }
  
          return instance;
      }
docs: Returns instance of mapping deriver.
  
  @param path path to the mapping file
  @return binary annotation mapping deriver