code: private JoinableResourceBundle buildDirMappedResourceBundle(String bundleId, String pathMapping) {
  		List<String> path = Collections.singletonList(pathMapping);
  		JoinableResourceBundle newBundle = new JoinableResourceBundleImpl(bundleId,
  				generateBundleNameFromBundleId(bundleId), null, fileExtension, new InclusionPattern(), path,
  				resourceReaderHandler, jawrConfig.getGeneratorRegistry());
  		return newBundle;
  	}
docs: Build a bundle based on a mapping returned by the
  ResourceBundleDirMapperFactory.
  
  @param bundleId
  the bundle Id
  @param pathMapping
  the path mapping
  @return a bundle based on a mapping returned by the
  ResourceBundleDirMapperFactory