code: def exists(self, **kwargs):
          
  
          if LooseVersion(self.tmos_ver) == LooseVersion('11.6.0'):
              return self._exists_11_6(**kwargs)
          else:
              return super(Network, self)._exists(**kwargs)
docs: Some objects when deleted still return when called by their
  
          direct URI, this is a known issue in 11.6.0.