code: def path(self, which=None):
          
          if which in (
                  'add_subscriptions',
                  'remove_subscriptions'):
              return '{0}/{1}'.format(
                  super(HostSubscription, self).path(which='base'),
                  which
              )
          return super(HostSubscription, self).path(which)
docs: Extend ``nailgun.entity_mixins.Entity.path``.
  
          The format of the returned path depends on the value of ``which``:
  
          add_subscriptions
              /hosts/<id>/add_subscriptions
          remove_subscriptions
              /hosts/<id>/remove_subscriptions
  
          ``super`` is called otherwise.