code: public static Config load(ClassLoader loader, Config config) {
          return load(loader, config, ConfigResolveOptions.defaults());
      }
docs: Like {@link #load(Config)} but allows you to specify
  the class loader for looking up resources.
  
  @param loader
  the class loader to use to find resources
  @param config
  the application's portion of the configuration
  @return resolved configuration with overrides and fallbacks added