code: static Config loadOvercastConfigFromFile(String file) {
  
          if (file == null) {
              return ConfigFactory.empty();
          }
  
          File f = new File(file);
          if (!f.exists()) {
              logger.warn("File {} not found.", f.getAbsolutePath());
              return ConfigFactory.empty();
          }
  
          logger.info("Loading from file {}", f.getAbsolutePath());
          return ConfigFactory.parseFile(f);
      }
docs: Load {@link Config} from 'file' but do not resolve it.