def display(self):
        raise NotImplementedError( "This must be implemented by the child class of Base_RL" )
Adds (or updates) the "Vary" header in the given HttpResponse object.
dataset/ETHPy150Open posborne/mlcollection/mlcollection/rl_base.py/Base_RL.display--crossover with--dataset/ETHPy150Open splunk/splunk-webframework/contrib/django/django/utils/cache.py/patch_vary_headers