This method is deprecated or moved on the latest stable version.
The last existing version (v1_9_3_392) is shown here.
ancestors()
public
Ancestors cache accessor. Maps a klass name to an Array of its ancestors in this store. If Foo in this store inherits from Object,Kernel won’t
be listed (it will be included from ruby’s ri store).
# File lib/rdoc/ri/store.rb, line 77
def ancestors
@cache[:ancestors]
end