Manual manager for the cached data.
The cache management is mainly transparent but it is useful sometimes to do theses actions manually.
A cache manager is linked to a ResourceObject and only works upon the cached data related to this object.
The cache manager should be accessed through the cache attribute of its corresponding resource.
>>> subject.cache.checkout(attrib=True, files=True, recursive=True)
>>> subject.cache.update()
>>> subject.cache.clear()