public static Lang getByFileName(String fileName) {
		String extension = FilenameUtils.getExtension(fileName);
		for (Lang each : values()) {
			if (each.getHandler().getExtension().equals(extension)) {
				return each;
			}
		}
		return Unknown;
	}
Get {@link Lang} enum by the given filename.

@param fileName filename
@return {@link Lang} enum value
ngrinder-core/src/main/java/net/grinder/lang/Lang.java