code: def get(self, address):
          
          loopback = super(LoopbackCollection, self).get(address=address)
          if loopback:
              return loopback
          raise InterfaceNotFound('Loopback address specified was not found')
docs: Get a loopback address by it's address. Find all loopback addresses
          by iterating at either the node level or the engine::
          
              loopback = engine.loopback_interface.get('127.0.0.10')
          
          :param str address: ip address of loopback
          :raises InterfaceNotFound: invalid interface specified
          :rtype: LoopbackInterface