code: def backend_disable(cls, backend):
          
          server = cls.backend_list(backend)
          oper = cls.call('hosting.rproxy.server.disable',
                          server[0]['id'])
          cls.echo('Desactivating backend on server %s' %
                   server[0]['ip'])
          cls.display_progress(oper)
          cls.echo('Backend desactivated')
          return oper
docs: Disable a backend for a server