@classmethod<EOL><INDENT>def get_object(cls, abbr):<DEDENT>
obj = get_metadata(abbr)<EOL>if obj is None:<EOL><INDENT>msg = '<STR_LIT>' % abbr<EOL>raise DoesNotExist(msg)<EOL><DEDENT>return cls(obj)<EOL>
This particular model needs its own constructor in order to take
advantage of the metadata cache in billy.util, which would otherwise
return unwrapped objects.