code: public static ManifestVersion get(final Class<?> clazz)
  	{
  		final String manifestUrl = ClassExtensions.getManifestUrl(clazz);
  		try
  		{
  			return of(manifestUrl != null ? new URL(manifestUrl) : null);
  		}
  		catch (final MalformedURLException ignore)
  		{
  			return of(null);
  		}
  	}
docs: Returns a ManifestVersion object by reading the manifest file from the JAR, WAR or EAR file
  that contains the given class.
  
  @param clazz
  the clazz
  @return the manifest version